title: Regular Expression C# Assert String is Fraction
body: <p>All,</p>
  
  <p>I need 2 regex expression that will work in .NET to detect whether the user typed in a fraction:</p>
  
  <ol>
  <li><p>Only fractional values without any whole parts (don't want to check for 1 1/4, 3 1/2, etc.)
  ONLY: 1/2, 3/4, 8/3, etc. The numerator, denominator can be floating point or integers.</p></li>
  <li><p>ALL valid fractions such as 1/3, 2/3, 1 1/4, etc.</p></li>
  </ol>
  
  <p>Thanks.</p>