complete math and rounding

Author: Evavic44

11_Working_with_Arrays/index.html

@@ -131,6 +131,6 @@ <h2>Close account</h2>
       &copy; by Jonas Schmedtmann. Don't claim as your own :)
     </footer> -->
 
-    <script src="challenge.js"></script>
+    <script src="script.js"></script>
   </body>
 </html>