70% and 30% columns with Bootstrap
<p>I got this "test" from a recruiting agency:  </p>

<blockquote>
  <p>Create a page template with two layers, one 70% width and the second
  30% of the page; in the first layer there will be the content, in the
  second the featured image.</p>
</blockquote>

<p>I was wondering if I can achieve those exact percent with Bootstrap even if it's not meant to be used that way.</p>