title: REGEX percentage 2 decimal with + and minus value
body: <p>This is my regex to check percentage with 2 decimals up to 100</p>
  
  <pre><code>^-?(100([.]0{1,2})?)$|(^\d{1,2}([.]\d{1,2})?)
  </code></pre>
  
  <p>but is working only in <code>99.16</code> and not like <code>-99.16</code></p>
  
  <p>How to allow also minus percentage?</p>