diff --git a/vlib/math/fraction.v b/vlib/math/fraction.v
index c388210ad0..d4e25ff4c9 100644
--- a/vlib/math/fraction.v
+++ b/vlib/math/fraction.v
@@ -87,7 +87,7 @@ pub fn (f1 Fraction) gcd() i64 {
 
 // Fraction method which reduces the fraction
 pub fn (f1 Fraction) reduce() Fraction {
-	cf := gcd(f1.n, f1.d)
+	cf := f1.gcd()
 	return Fraction{f1.n / cf, f1.d / cf}
 }
 
diff --git a/vlib/math/fraction_test.v b/vlib/math/fraction_test.v
index 613a001a19..49b7515800 100644
--- a/vlib/math/fraction_test.v
+++ b/vlib/math/fraction_test.v
@@ -132,4 +132,10 @@ fn test_fraction_equals() {
 	f1 = math.fraction(1,2)
 	f2 = math.fraction(3,4)
 	assert !f1.equals(f2)
+}
+
+fn test_gcd_and_reduce(){
+	mut f := math.fraction(3, 9)
+	assert f.gcd() == 3
+	assert f.reduce().equals(math.fraction(1, 3)) 
 }
\ No newline at end of file