title: How to resize images in % of their size with grunt?
body: <p>How to resize images to a multiple of their original size using grunt ?</p>
  
  <p>I have a folder with original images within a tree structure</p>
  
  <ul>
  <li>GFX\myDirectoryTree\Files.png</li>
  </ul>
  
  <p>I want it to export resized files to several tree structures </p>
  
  <ul>
  <li>OUTPUT\100\myDirectoryTree\Files.png > 100% size</li>
  <li>OUTPUT\50\myDirectoryTree\Files.png > 50% size</li>
  <li>OUTPUT\20\myDirectoryTree\Files.png > 20% size</li>
  </ul>