diff --git a/README.md b/README.md
index 70d0152..f4dc028 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 25 / 3 = 8
 95 / 9 = 10
 68 - 96 = -28
+63 - 24 = 39