Convert a ratio to an array of percentages.

gistfile1.js

function rtp(ratios) {
    var total = 0;

    ratios.forEach(function(ratio) {
        total += ratio;
    });

    var percentages = [];

    ratios.forEach(function(ratio) {
        var percentage = (ratio / total) * 100;
        percentages.push(percentage);
    });

    return percentages;
}