Ok, so I tried doing running the script below, and all that appeared is the button, any help?
<DOCTYPE html>
<html>
<body>
<p id="start"> </p>
<button onclick="end()"> Click Me To Find 10% more than the number above</button>
<p id="ending"> </p>
<script>
var start_value = 10000 ;
document.getElementById("start").innerHTML = start_value ;
var percent = start_value / 10 ;
var end_value = start_value + percent ;
function end()
document.getElementById("ending").innerHTML = end_value ;
</script>
</body>
</html>