diff --git a/client/src/components/Categories/__snapshots__/Categories.test.tsx.snap b/client/src/components/Categories/__snapshots__/Categories.test.tsx.snap
index 23793fcd..d26d364e 100644
--- a/client/src/components/Categories/__snapshots__/Categories.test.tsx.snap
+++ b/client/src/components/Categories/__snapshots__/Categories.test.tsx.snap
@@ -43,7 +43,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           IF
         </strong>
-         at or above 90th percentile for 
+         at or above the 90th percentile for 
         <a
           href="#exp-agr-loss-rate"
         >
@@ -70,7 +70,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           AND
         </strong>
-         is above 65th percentile for 
+         is above the 65th percentile for 
         <a
           href="#low-income"
         >
@@ -106,7 +106,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           IF
         </strong>
-         at or above 90th percentile for 
+         at or above the 90th percentile for 
         <a
           href="#energy-burden"
         >
@@ -127,7 +127,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           AND
         </strong>
-         is above 65th percentile for 
+         is above the 65th percentile for 
         <a
           href="#low-income"
         >
@@ -163,7 +163,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           IF
         </strong>
-         at or above 90th percentile for 
+         at or above the 90th percentile for 
         <a
           href="#diesel-pm"
         >
@@ -184,7 +184,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           AND
         </strong>
-         is above 65th percentile for 
+         is above the 65th percentile for 
         <a
           href="#low-income"
         >
@@ -220,7 +220,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           IF
         </strong>
-         at or above 90th percentile for 
+         at or above the 90th percentile for 
         <a
           href="#lead-paint"
         >
@@ -233,7 +233,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
           median home value
         </a>
          is at or less than
-        90th percentile OR at or above the 90th percentile for the 
+        the 90th percentile OR at or above the 90th percentile for the 
         <a
           href="#house-burden"
         >
@@ -248,7 +248,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           AND
         </strong>
-         is above 65th percentile for 
+         is above the 65th percentile for 
         <a
           href="#low-income"
         >
@@ -284,7 +284,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           IF
         </strong>
-         at or above 90th percentile for 
+         at or above the 90th percentile for 
         <a
           href="#prox-haz"
         >
@@ -311,7 +311,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           AND
         </strong>
-         is above 65th percentile for 
+         is above the 65th percentile for 
         <a
           href="#low-income"
         >
@@ -347,7 +347,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           IF
         </strong>
-         at or above 90th percentile for 
+         at or above the 90th percentile for 
         <a
           href="#waste-water"
         >
@@ -362,7 +362,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           AND
         </strong>
-         is above 65th percentile for 
+         is above the 65th percentile for 
         <a
           href="#low-income"
         >
@@ -398,7 +398,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           IF
         </strong>
-         at or above 90th percentile for 
+         at or above the 90th percentile for 
         <a
           href="#asthma"
         >
@@ -431,7 +431,7 @@ exports[`rendering of the Categories checks if component renders 1`] = `
         <strong>
           AND
         </strong>
-         is above 65th percentile for 
+         is above the 65th percentile for 
         <a
           href="#low-income"
         >
diff --git a/client/src/components/CategoryCard/__snapshots__/CategoryCard.test.tsx.snap b/client/src/components/CategoryCard/__snapshots__/CategoryCard.test.tsx.snap
index b12f358b..d6db1102 100644
--- a/client/src/components/CategoryCard/__snapshots__/CategoryCard.test.tsx.snap
+++ b/client/src/components/CategoryCard/__snapshots__/CategoryCard.test.tsx.snap
@@ -21,7 +21,7 @@ exports[`rendering of the CategoryCard checks if component renders 1`] = `
       <strong>
         IF
       </strong>
-       at or above 90th percentile for 
+       at or above the 90th percentile for 
       <a
         href="#exp-agr-loss-rate"
       >
@@ -48,7 +48,7 @@ exports[`rendering of the CategoryCard checks if component renders 1`] = `
       <strong>
         AND
       </strong>
-       is above 65th percentile for 
+       is above the 65th percentile for 
       <a
         href="#low-income"
       >
diff --git a/client/src/components/DatasetContainer/tests/__snapshots__/datasetContainer.test.tsx.snap b/client/src/components/DatasetContainer/tests/__snapshots__/datasetContainer.test.tsx.snap
index e502f53f..209a33f1 100644
--- a/client/src/components/DatasetContainer/tests/__snapshots__/datasetContainer.test.tsx.snap
+++ b/client/src/components/DatasetContainer/tests/__snapshots__/datasetContainer.test.tsx.snap
@@ -554,7 +554,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
               <div>
                 
         Percent of housing units built pre-1960, used as an indicator of potential lead paint exposure in
-        tracts with median home values less than 90th percentile.
+        tracts with median home values less than the 90th percentile.
       
               </div>
               <ul>
diff --git a/client/src/data/copy/methodology.tsx b/client/src/data/copy/methodology.tsx
index 1b947c06..8f7af3c3 100644
--- a/client/src/data/copy/methodology.tsx
+++ b/client/src/data/copy/methodology.tsx
@@ -170,7 +170,7 @@ export const CATEGORY_AND_CLAUSE = {
   LOW_INC_65_WHEN_HIGH_ED_LTE_20: <FormattedMessage
     id= {'methodology.paage.category.and.clause.low.inc.hs.ed'}
     defaultMessage={`
-      {and} is above 65th percentile for {lowIncome} AND at or below 20% for {highEdEnrollRate} 
+      {and} is above the 65th percentile for {lowIncome} AND at or below 20% for {highEdEnrollRate} 
     `}
     description= {'and portion of the formula dealing with lower income and high school degree rate'}
     values= {{
@@ -220,7 +220,7 @@ export const CATEGORIES = {
     IF: <FormattedMessage
       id= {'indicator.categories.climate.change.if'}
       defaultMessage= {`
-      {if} at or above 90th percentile for {expAgrLossRate} OR {expbuildLossRate} OR {expPopLossRate}
+      {if} at or above the 90th percentile for {expAgrLossRate} OR {expbuildLossRate} OR {expPopLossRate}
       `}
       description= {'if portion of the formula'}
       values= {{
@@ -255,7 +255,7 @@ export const CATEGORIES = {
     IF: <FormattedMessage
       id= {'indicator.categories.clean.energy.if'}
       defaultMessage= {`
-        {if} at or above 90th percentile for {energyCostBur} OR {pm25}
+        {if} at or above the 90th percentile for {energyCostBur} OR {pm25}
       `}
       description= {'if portion of the formula'}
       values= {{
@@ -289,7 +289,7 @@ export const CATEGORIES = {
     IF: <FormattedMessage
       id= {'indicator.categories.clean.transport.if'}
       defaultMessage= {`
-        {if} at or above 90th percentile for {dieselPM} or {traffic}
+        {if} at or above the 90th percentile for {dieselPM} or {traffic}
       `}
       description= {'if portion of the formula'}
       values= {{
@@ -323,8 +323,8 @@ export const CATEGORIES = {
     IF: <FormattedMessage
       id= {'indicator.categories.afford.house.if'}
       defaultMessage= {`
-        {if} at or above 90th percentile for {lead} AND {medianHomeVal} is at or less than
-        90th percentile OR at or above the 90th percentile for the {houseBur}
+        {if} at or above the 90th percentile for {lead} AND {medianHomeVal} is at or less than
+        the 90th percentile OR at or above the 90th percentile for the {houseBur}
       `}
       description= {'if portion of the formula'}
       values= {{
@@ -359,7 +359,7 @@ export const CATEGORIES = {
     IF: <FormattedMessage
       id= {'indicator.categories.legacy.pollution.if'}
       defaultMessage= {`
-        {if} at or above 90th percentile for {proxHaz} OR {proxNPL} OR {proxRMP}
+        {if} at or above the 90th percentile for {proxHaz} OR {proxNPL} OR {proxRMP}
       `}
       description= {'if portion of the formula'}
       values= {{
@@ -394,7 +394,7 @@ export const CATEGORIES = {
     IF: <FormattedMessage
       id= {'indicator.categories.clean.water.if'}
       defaultMessage= {`
-        {if} at or above 90th percentile for {wasteWater}
+        {if} at or above the 90th percentile for {wasteWater}
       `}
       description= {'if portion of the formula'}
       values= {{
@@ -427,7 +427,7 @@ export const CATEGORIES = {
     IF: <FormattedMessage
       id= {'indicator.categories.health.burdens.if'}
       defaultMessage= {`
-        {if} at or above 90th percentile for {asthma} OR {diabetes} OR {heart} OR {life}
+        {if} at or above the 90th percentile for {asthma} OR {diabetes} OR {heart} OR {life}
       `}
       description= {'if portion of the formula'}
       values= {{
@@ -1028,7 +1028,7 @@ export const INDICATORS = [
       id= {'category.lead.paint.description.text'}
       defaultMessage= {`
         Percent of housing units built pre-1960, used as an indicator of potential lead paint exposure in
-        tracts with median home values less than 90th percentile.
+        tracts with median home values less than the 90th percentile.
       `}
       description= {'description text for lead paint'}
     />,
diff --git a/client/src/pages/__snapshots__/methodology.test.tsx.snap b/client/src/pages/__snapshots__/methodology.test.tsx.snap
index c285cd5b..4ce41cd2 100644
--- a/client/src/pages/__snapshots__/methodology.test.tsx.snap
+++ b/client/src/pages/__snapshots__/methodology.test.tsx.snap
@@ -428,7 +428,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             IF
           </strong>
-           at or above 90th percentile for 
+           at or above the 90th percentile for 
           <a
             href="#exp-agr-loss-rate"
           >
@@ -455,7 +455,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             AND
           </strong>
-           is above 65th percentile for 
+           is above the 65th percentile for 
           <a
             href="#low-income"
           >
@@ -491,7 +491,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             IF
           </strong>
-           at or above 90th percentile for 
+           at or above the 90th percentile for 
           <a
             href="#energy-burden"
           >
@@ -512,7 +512,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             AND
           </strong>
-           is above 65th percentile for 
+           is above the 65th percentile for 
           <a
             href="#low-income"
           >
@@ -548,7 +548,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             IF
           </strong>
-           at or above 90th percentile for 
+           at or above the 90th percentile for 
           <a
             href="#diesel-pm"
           >
@@ -569,7 +569,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             AND
           </strong>
-           is above 65th percentile for 
+           is above the 65th percentile for 
           <a
             href="#low-income"
           >
@@ -605,7 +605,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             IF
           </strong>
-           at or above 90th percentile for 
+           at or above the 90th percentile for 
           <a
             href="#lead-paint"
           >
@@ -618,7 +618,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
             median home value
           </a>
            is at or less than
-        90th percentile OR at or above the 90th percentile for the 
+        the 90th percentile OR at or above the 90th percentile for the 
           <a
             href="#house-burden"
           >
@@ -633,7 +633,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             AND
           </strong>
-           is above 65th percentile for 
+           is above the 65th percentile for 
           <a
             href="#low-income"
           >
@@ -669,7 +669,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             IF
           </strong>
-           at or above 90th percentile for 
+           at or above the 90th percentile for 
           <a
             href="#prox-haz"
           >
@@ -696,7 +696,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             AND
           </strong>
-           is above 65th percentile for 
+           is above the 65th percentile for 
           <a
             href="#low-income"
           >
@@ -732,7 +732,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             IF
           </strong>
-           at or above 90th percentile for 
+           at or above the 90th percentile for 
           <a
             href="#waste-water"
           >
@@ -747,7 +747,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             AND
           </strong>
-           is above 65th percentile for 
+           is above the 65th percentile for 
           <a
             href="#low-income"
           >
@@ -783,7 +783,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             IF
           </strong>
-           at or above 90th percentile for 
+           at or above the 90th percentile for 
           <a
             href="#asthma"
           >
@@ -816,7 +816,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
           <strong>
             AND
           </strong>
-           is above 65th percentile for 
+           is above the 65th percentile for 
           <a
             href="#low-income"
           >
@@ -1459,7 +1459,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
                 <div>
                   
         Percent of housing units built pre-1960, used as an indicator of potential lead paint exposure in
-        tracts with median home values less than 90th percentile.
+        tracts with median home values less than the 90th percentile.
       
                 </div>
                 <ul>