diff --git a/.github/workflows/lint-pr.yml b/.github/workflows/lint-pr.yml
index f025feb..2e42165 100644
--- a/.github/workflows/lint-pr.yml
+++ b/.github/workflows/lint-pr.yml
@@ -6,6 +6,6 @@ on:
 
 jobs:
   build:    
-    uses: unosquare/bump-npm-version/.github/workflows/lint.yml@master
+    uses: unosquare/bump-npm-version/.github/workflows/lint-pnpm.yml@master
     secrets:
-      github-token: ${{ secrets.GPR_ACCESS_TOKEN }}
\ No newline at end of file
+      github-token: ${{ secrets.GPR_ACCESS_TOKEN }}
diff --git a/src/delta.ts b/src/delta.ts
index 1f0490c..aa1e7b4 100644
--- a/src/delta.ts
+++ b/src/delta.ts
@@ -17,7 +17,7 @@ export const calculateDeltaValue = (current?: number, previous?: number) => {
 
 export const calculateDeltaPercent = (current?: number, previous?: number) => {
     if (!current || !previous) return null;
-    return ((current - previous) / current) * 100;
+    return ((current - previous) / previous) * 100;
 };
 
 export const calculateDelta = (current?: number, previous?: number) => {
diff --git a/test/delta.spec.ts b/test/delta.spec.ts
index 8524644..b9efe35 100644
--- a/test/delta.spec.ts
+++ b/test/delta.spec.ts
@@ -4,13 +4,13 @@ describe('calculateDelta', () => {
     it('should return delta, deltaPercent, and deltaString', () => {
         const [delta, deltaPercent, deltaString] = calculateDelta(10, 5);
         expect(delta).toBe(5);
-        expect(deltaPercent).toBe(50);
+        expect(deltaPercent).toBe(100);
         expect(deltaString).toBe('increase');
     });
     it('should return delta, deltaPercent, and deltaString', () => {
         const [delta, deltaPercent, deltaString] = calculateDelta(5, 10);
         expect(delta).toBe(-5);
-        expect(deltaPercent).toBe(-100);
+        expect(deltaPercent).toBe(-50);
         expect(deltaString).toBe('decrease');
     });
     it('should return delta, deltaPercent, and deltaString', () => {