diff --git a/docs/mathutil.md b/docs/mathutil.md
index d78ad49..de069c2 100644
--- a/docs/mathutil.md
+++ b/docs/mathutil.md
@@ -365,15 +365,18 @@ import (
 )
 
 func main() {
-    result1 := mathutil.Percent(1, 2, 2)
-    result2 := mathutil.Percent(0.1, 0.3, 2)
+    result1 := Percent(1, 2, 2)
+	result2 := Percent(0.1, 0.3, 2)
+	result3 := Percent(-30305, 408420, 2)
 
-    fmt.Println(result1)
-    fmt.Println(result2)
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
 
-    // Output:
-    // 0.5
-    // 0.33
+	// Output:
+	// 50
+	// 33.33
+	// -7.42
 }
 ```
 
diff --git a/docs/mathutil_zh-CN.md b/docs/mathutil_zh-CN.md
index f6a964d..0b53d7e 100644
--- a/docs/mathutil_zh-CN.md
+++ b/docs/mathutil_zh-CN.md
@@ -365,15 +365,18 @@ import (
 )
 
 func main() {
-    result1 := mathutil.Percent(1, 2, 2)
-    result2 := mathutil.Percent(0.1, 0.3, 2)
+    result1 := Percent(1, 2, 2)
+	result2 := Percent(0.1, 0.3, 2)
+	result3 := Percent(-30305, 408420, 2)
 
-    fmt.Println(result1)
-    fmt.Println(result2)
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
 
-    // Output:
-    // 0.5
-    // 0.33
+	// Output:
+	// 50
+	// 33.33
+	// -7.42
 }
 ```
 
diff --git a/mathutil/mathutil.go b/mathutil/mathutil.go
index 31c5996..c2ecfb2 100644
--- a/mathutil/mathutil.go
+++ b/mathutil/mathutil.go
@@ -60,7 +60,7 @@ func Percent(val, total float64, n int) float64 {
 	if total == 0 {
 		return float64(0)
 	}
-	tmp := val / total
+	tmp := val / total * 100
 	result := RoundToFloat(tmp, n)
 
 	return result
diff --git a/mathutil/mathutil_exmaple_test.go b/mathutil/mathutil_exmaple_test.go
index da73da1..babc37f 100644
--- a/mathutil/mathutil_exmaple_test.go
+++ b/mathutil/mathutil_exmaple_test.go
@@ -53,13 +53,16 @@ func ExampleFactorial() {
 func ExamplePercent() {
 	result1 := Percent(1, 2, 2)
 	result2 := Percent(0.1, 0.3, 2)
+	result3 := Percent(-30305, 408420, 2)
 
 	fmt.Println(result1)
 	fmt.Println(result2)
+	fmt.Println(result3)
 
 	// Output:
-	// 0.5
-	// 0.33
+	// 50
+	// 33.33
+	// -7.42
 }
 
 func ExampleRoundToFloat() {
diff --git a/mathutil/mathutil_test.go b/mathutil/mathutil_test.go
index d82f8a4..723c84f 100644
--- a/mathutil/mathutil_test.go
+++ b/mathutil/mathutil_test.go
@@ -36,8 +36,9 @@ func TestFactorial(t *testing.T) {
 func TestPercent(t *testing.T) {
 	assert := internal.NewAssert(t, "TestPercent")
 
-	assert.Equal(0.5, Percent(1, 2, 2))
-	assert.Equal(0.33, Percent(0.1, 0.3, 2))
+	assert.EqualValues(50, Percent(1, 2, 2))
+	assert.EqualValues(33.33, Percent(0.1, 0.3, 2))
+	assert.EqualValues(-7.42, Percent(-30305, 408420, 2))
 }
 
 func TestRoundToFloat(t *testing.T) {