Chart.js 2.0 doughnut tooltip percentages
<p>I have worked with chart.js 1.0 and had my doughnut chart tooltips displaying percentages based on data divided by dataset, but I'm unable to replicate this with chart 2.0.</p>

<p>I have searched high and low and have not found a working solution. I know that it will go under options but everything I've tried has made the pie dysfunctional at best.</p>

<pre><code>&lt;html&gt;

&lt;head&gt;
    &lt;title&gt;Doughnut Chart&lt;/title&gt;
    &lt;script src="../dist/Chart.bundle.js"&gt;&lt;/script&gt;
    &lt;script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"&gt;&lt;/script&gt;
    &lt;style&gt;
    canvas {
        -moz-user-select: none;
        -webkit-user-select: none;
        -ms-user-select: none;
    }
    &lt;/style&gt;
&lt;/head&gt;

&lt;body&gt;
    &lt;div id="canvas-holder" style="width:75%"&gt;
        &lt;canvas id="chart-area" /&gt;
    &lt;/div&gt;
    &lt;script&gt;
    var randomScalingFactor = function() {
        return Math.round(Math.random() * 100);
    };
    var randomColorFactor = function() {
        return Math.round(Math.random() * 255);
    };
    var randomColor = function(opacity) {
        return 'rgba(' + randomColorFactor() + ',' + randomColorFactor() + ',' + randomColorFactor() + ',' + (opacity || '.3') + ')';
    };

    var config = {
        type: 'doughnut',
        data: {
            datasets: [{
                data: [
                    486.5,
                    501.5,
                    139.3,
                    162,
                    263.7,
                ],
                backgroundColor: [
                    "#F7464A",
                    "#46BFBD",
                    "#FDB45C",
                    "#949FB1",
                    "#4D5360",
                ],
                label: 'Expenditures'
            }],
            labels: [
                "Hospitals: $486.5 billion",
                "Physicians &amp; Professional Services: $501.5 billion",
                "Long Term Care: $139.3 billion",
                "Prescription Drugs: $162 billion",
                "Other Expenditures: $263.7 billion"
            ]
        },
        options: {
            responsive: true,
            legend: {
                position: 'bottom',
            },
            title: {
                display: false,
                text: 'Chart.js Doughnut Chart'
            },
            animation: {
                animateScale: true,
                animateRotate: true
            }

        }
    };

    window.onload = function() {
        var ctx = document.getElementById("chart-area").getContext("2d");
        window.myDoughnut = new Chart(ctx, config);{

        }
    };


    &lt;/script&gt;
&lt;/body&gt;

&lt;/html&gt;
</code></pre>