title: objective c regex starts with 1 or 2 digits
body: <p>I need the regex formula for 
  ex "<strong>17% off</strong> etc etc"
  or "<strong>2% off</strong> etc etc etc"
  so if the string starts with a one or 2 digit number followed by the percent sign, space, and the word 'off'</p>
  
  <p>I tried </p>
  
  <pre><code>NSPredicate* test = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", @"^[0-9]{1,2}% off"];
  if ( [test evaluateWithObject:candidate] )
  {
  .... etc..
  </code></pre>
  
  <p>but no luck.</p>
  
  <p>I appreciate any insight.</p>