diff --git a/08_calculator/calculator.js b/08_calculator/calculator.js
index c22e8d2..3f36572 100644
--- a/08_calculator/calculator.js
+++ b/08_calculator/calculator.js
@@ -2,8 +2,8 @@ const add = function() {
 	
 };
 
-const subtract = function() {
-	
+const subtract = function(a,b) {
+return a+b
 };
 
 const sum = function() {