diff --git a/README.md b/README.md
index ece4be7..0ccefe5 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,6 @@
 51 / 10 = 5
 65 - 38 = 27
 93 + 38 = 131
-47 - 90 = -43
 90 * 79 = 7110
 90 - 47 = 43
 42 / 6 = 7