title: maths - percentage questions increase figures to reach percentage
body: <p>I'm using SQL server to try an calculate this although to be fair the question is more maths/logic based.</p>
  
  <p>I need to work out how to get a call received/answered ratio of a certain percentage, e.g. 80%</p>
  
  <p>So if it currently stands at <code>12/6 - 50%</code>, I need to work out how many calls need to come in without any being dropped to get 80%,
  the only way I can work out is by trial and error,</p>
  
  <p>i.e.</p>
  
  <pre><code>13/7 = 54%
  16/10= 63%
  24/18= 75%
  30/24= 80%
  </code></pre>
  
  <p>The only way I can think to do this at current is to add 1 to a variable each time until the percentage reaches 80 but its been a while since school, I'm sure there's a better way.</p>
  
  <p>thanks</p>