title: How to check change between two values (in percent)?
body: <p>I have two values (previous and current) and I want to check change between them (in percent):</p>
  
  <pre><code>(current/previous)*100
  </code></pre>
  
  <p>But if the previous value is 0 I get Division By Zero, and if value will not change I get 100%. </p>