title: Output string with decimal format limited to 2 dp
body: <p>Stuck on this which im sure there is an easy solution to, just cannot work it out!! </p>
  
  <p>I have tried decmialformat, numberformat, string.format() etc and nothing works. .</p>
  
  <p>code below, i want to calculation to just show the output limited to 2 decimal places.  Have spent the last 2 hours trying various methods all of which causes the app to crash when run... </p>
  
  <pre><code>    Output = (Output1 / (1 -(Output2/100)))
  
      String OutputString = String.valueOf(Output);
  
      Num.setText(OutputString);
  </code></pre>