Question: how to calculate percentage of a number in javascript?
Answer: You divide the number you you want to get the percentage for by the number you're getting the percentage of, then multiply it by 100 and do a Math. ...  var wholePercent = Math.floor(3/9*100); To turn it into a function: function getWholePercent(percentFor,percentOf) ...  call it like this: var wholePercent=getWholePercent(3,9);