title: Subtract Pixels From Percentage in SASS?
body: <p>I know you're able to do some simple math in Sass/Scss. But is there a way to subtract pixels from percentages? For example:</p>
  
  <pre><code>$image-size: 200px;
  
  .bio {
      width: 100% - $image-size;
  }
  </code></pre>