title: XCode error "invalid operands to binary expression"
body: <p>I have an NSTimeInterval that is stored as a double. I would like to get the amount of minutes that are inide of the second value using the % operator.</p>
  
  <pre><code>int remainingSeconds = scratch % 60;
  </code></pre>
  
  <p>The error said "invalid operands to binary expression" point at %
  Help please.</p>