diff --git a/src/maths.rs b/src/maths.rs
index e49bb57..38af779 100644
--- a/src/maths.rs
+++ b/src/maths.rs
@@ -29,9 +29,7 @@ impl Rational {
     pub fn reduce(&self) -> Self {
         let gcd = gcd(self.numerator, self.denominator);
         let mut res = Rational::new(self.numerator / gcd, self.denominator / gcd);
-        if res.numerator < 0 && res.denominator < 0 {
-            res = -1 * res;
-        } else if res.denominator < 0 {
+        if res.denominator < 0 {
             res = Rational::new(-res.numerator, -res.denominator);
         }
         res