title: Dividing screen in to 1/3 and 2/3 views using autolayout
body: <p>Is there a way to divide the screen by percentage (not equal percentage)
  I need to split the screen to two parts 1/3 and 2/3.
  I know how to split to equal parts but cant figure out how to split to non equal.</p>
  
  <p>Thanks</p>