title: Kibana - display statistics (percentage) relative to other graph results
body: <p>I'm facing some difficulties displaying statistics of one graph (in percentage mode) relative to other graph results.
  For example, the following graph displays the total number of write failures:  </p>
  
  <p><a href="https://i.stack.imgur.com/bWZ7Z.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bWZ7Z.png" alt="enter image description here"></a> </p>
  
  <p>And the other graph, display the number of write failures of a specific group:</p>
  
  <p><a href="https://i.stack.imgur.com/FXceV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FXceV.png" alt="enter image description here"></a>  </p>
  
  <p>What I want to do, is displaying the second graph (Y-axis) in percentage, relative to the results of the first graph.</p>
  
  <p>For example, the number of total write failures in the first graph at "2018-08-09 03:00" is 92,000 (green line).<br>
  And the number of write failures, of this specific group in the second graph at "2018-08-09 03:00" is 15,000.</p>
  
  <p>So Instead of displaying 15,000 in the second graph, I want to display 16.30 percentage:</p>
  
  <pre><code>(15000/92000.0) * 100 = 16.30%
  </code></pre>
  
  <p>Your help is appreciated. 
  Thanks.</p>