title: d3.js - Zoomable Circle Packing Percentage
body: <p>I am trying to use the visualization from <a href="https://gist.github.com/mbostock/7607535" rel="nofollow noreferrer">here</a> and I was hoping that someone could help me display the percentages.  I have managed to add the values by adding the following line of code: </p>
  
  <p><code>.text(function (d) { return d.name + ' (' + d.value + ') '; });</code></p>
  
  <p>And the above works flawlessly.  But, is there a way to display the percentages?</p>