diff --git a/services/backend/src/service/environmental_authority.js b/services/backend/src/service/environmental_authority.js
index 2be0c37b..5e15903a 100644
--- a/services/backend/src/service/environmental_authority.js
+++ b/services/backend/src/service/environmental_authority.js
@@ -32,8 +32,13 @@ module.exports = (eaPersistence, seService) => {
           values[key] += area.sum;
         }
       });
+      const areaAdd = values.reduce((prev, nex) => prev + nex, 0);
 
-      return keys.map((fc, idx) => ({ key: fc, area: values[idx] }));
+      return keys.map((fc, idx) => ({
+        key: fc,
+        area: values[idx],
+        percentage: values[idx] / areaAdd,
+      }));
     },
 
     /**
@@ -45,7 +50,13 @@ module.exports = (eaPersistence, seService) => {
      */
     getAreaByBioticUnit: async (envAuthorityId) => {
       const data = await eaPersistence.findAreaByBioticUnit(envAuthorityId);
-      return data.map((datum) => ({ ...datum, area: Number(datum.area) }));
+      const dataToNumber = data.map((e) => Number(e.area));
+      const areaAdd = dataToNumber.reduce((prev, nex) => prev + nex);
+      return data.map((datum) => ({
+        ...datum,
+        area: Number(datum.area),
+        percentage: Number(datum.area) / areaAdd,
+      }));
     },
 
     /**
@@ -55,7 +66,11 @@ module.exports = (eaPersistence, seService) => {
      *
      * @returns {Object[]} total area for each biome
      */
-    getAreaByBiome: async (envAuthorityId) => eaPersistence.findAreaByBiome(envAuthorityId),
+    getAreaByBiome: async (envAuthorityId) => {
+      const data = await eaPersistence.findAreaByBiome(envAuthorityId);
+      const areaAdd = data.reduce((pre, nex) => pre + nex.area, 0);
+      return data.map((e) => ({ area: e.area, key: e.key, percentage: e.area / areaAdd }));
+    },
 
     /**
      * Get total area grouped by sub-basin given environmental authority filtered by a biome
diff --git a/services/forest/src/service/forestLP.js b/services/forest/src/service/forestLP.js
index 54fb1ada..5f71c202 100644
--- a/services/forest/src/service/forestLP.js
+++ b/services/forest/src/service/forestLP.js
@@ -27,7 +27,7 @@ module.exports = (ForestLPPersistence, restAPI) => {
             const totalArea = item.map((o) => o.area).reduce((prev, next) => prev + next);
             const periodData = item.map((period) => ({
               ...period,
-              percentage: period.area / totalArea,
+              percentage: (period.area / totalArea) * 100,
             }));
             data.push({
               id: periods[i],