diff --git a/src/lib.rs b/src/lib.rs
index de7e3af..7331040 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -154,7 +154,7 @@ impl ops::Neg for Fraction {
 
 impl fmt::Display for Fraction {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        todo!()
+        write!(f, "{0}/{1}", self.num, self.den)
     }
 }