diff --git a/Calculator.class b/Calculator.class
new file mode 100644
index 0000000..743f9bd
Binary files /dev/null and b/Calculator.class differ
diff --git a/Calculator.java b/Calculator.java
index bc5c9f6..1c9c8ef 100644
--- a/Calculator.java
+++ b/Calculator.java
@@ -98,7 +98,7 @@ public double rectAr(double x, double y) {
 	 * @return the perimeter of a rectangle with sides x and y.
 	 */
 	public double rectPer(double x, double y) {
-		return 2 * x * y;
+		return (2 * x) + (2 * y);
 	}
 
 	/**