title: Need to categorized one column with respect to another Column
body: <p>I want to categorized one column with respect to another Column.
  The question is what percentage of car is red for age group
  below 35
  36-48
  49 above</p>
  
  <p>Data is</p>
  
  <pre><code>AGE RED_CAR freq
  16  yes 2
  17  yes 1
  18  yes 2
  19  yes 1
  21  yes 1
  22  yes 8
  23  yes 4
  24  yes 13
  25  yes 5
  26  yes 7
  27  yes 4
  28  yes 5
  29  yes 5
  30  yes 9
  </code></pre>
  
  <p>Kindly help</p>