First, btw, you put your question in Java when it should be in Javascript. Secondly, your problem is you did not format correctly your var section. Instead of a semi colon use { } This should solve your synax error
var quarter = function(number) {
return number/4
}
Finally, and this is not necessary to passing the lesson but if you want a simplier way to answer in your if (quarter you can just put 13 in it instead of (72)% etc. So that would look like this at the end