title: How to set tooltips to display percentages to match axis in Google Visualization Line Chart?
body: <p>The tooltips can be set to display percentages using the following code:</p>
  
  <pre>
  var formatter = new google.visualization.NumberFormat({
        fractionDigits: 2,
        suffix: '%'
      });
  formatter.format(data, 1); // Apply formatter to first column.
  </pre>
  
  <p>Is there a way for NumberFormat to multiply each element by 100? Otherwise the tooltip appears as .50%.</p>
  
  <p>I am using <code>vAxis.format = "format:'#%' "</code> which does multiply by 100. So .5 is displayed as 50% on the vertical axis.</p>
  
  <p>According to the documentation(<a href="http://icu-project.org/apiref/icu4c/classDecimalFormat.html#_details" rel="nofollow noreferrer">icu-project.org/apiref</a>), this can be overwritten by enclosing the % in single quotes, but this did not work.</p>
  
  <p>The net result is that the tooltips do not match the axis. What is the best way to do this?</p>