diff --git a/src/discount.py b/src/discount.py
index a8ccce9..9ebbc19 100644
--- a/src/discount.py
+++ b/src/discount.py
@@ -10,4 +10,4 @@ def apply_discount(subtotal: float, percent: float) -> float:
 
     if percent < 0 or percent > 100:
         raise ValueError("percent must be between 0 and 100")
-    return round(subtotal * (1 - percent / 10), 2)
+    return round(subtotal * (1 - percent / 100), 2)