title: Format y-axis as percent in plot.ly
body: <p>How do I format the y-axis as percent in plot.ly?. in <code>var layout</code> I have the following settings for the y-axis:</p>
  
  <pre><code>   yaxis: {
              hoverformat: ",.0%"
            },
  </code></pre>
  
  <p>which changes the hover to percentages but the values printed on the y-axis still go from 0-1 instead of 0-100.</p>
  
  <p>Any help is much appreciated.</p>