title: Graphite divideSeries wrong result
body: <p>I'm using Grafana and Graphite to draw a percentage of "succes" rate in our dashboard:  </p>
  
  <p>I can draw the success rate
  <a href="https://i.stack.imgur.com/3WNJR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3WNJR.png" alt="success"></a></p>
  
  <p>I can metric the total
  <a href="https://i.stack.imgur.com/63Apx.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/63Apx.png" alt="total"></a></p>
  
  <p>But when I try to get the percentage, it doesn't seem to do the division as I was taught in school :)
  <a href="https://i.stack.imgur.com/UnFIY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UnFIY.png" alt="divideSeries"></a>
  <a href="https://i.stack.imgur.com/xkfvp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xkfvp.png" alt="percent"></a>
  Am I doing something wrong?</p>
  
  <p>(I tried with both the <em>current</em> value of the series and the <em>average</em>)</p>
  
  <p>Following the suggestion of @AussieDan the situation get more weird:</p>
  
  <p>Drawing all the three series, I can see just 2:
  <a href="https://i.stack.imgur.com/GaPXu.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GaPXu.png" alt="All over time"></a></p>
  
  <p>Removing the <em>total</em> from the graph the values are consistent...
  <a href="https://i.stack.imgur.com/RIRKl.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RIRKl.png" alt="success/ratio over time"></a></p>
  
  <p>But when I leave just the ratio of the two:
  <a href="https://i.stack.imgur.com/z3RSA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/z3RSA.png" alt="ratio"></a></p>
  
  <p>Using <em>asPercent</em>:
  <a href="https://i.stack.imgur.com/vnXWG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vnXWG.png" alt="enter image description here"></a></p>