title: Rational numbers appear in reduced forms
body: <p>I want to save a rational number <code>3/12</code> in a variable using this code:</p>
  
  <pre><code>rNo = Rational(3, 12)
  # =&gt; 1/4
  </code></pre>
  
  <p>but ruby reduces the number to <code>1/4</code>.</p>
  
  <p>Can anybody please tell me how to keep the numbers as I write them?</p>