title: SSRS parenthesis around negative values
body: <p>I have expression like this</p>
  
  <pre><code>=Sum(Fields!TotalBatch.Value - Fields!TotalUsage.Value)
  </code></pre>
  
  <p>I need a format like below</p>
  
  <p>123.34</p>
  
  <p>(234.45)</p>
  
  <p>I had already set the properties > Number > Use Separator (,) > decimal places = 0 > Negative Numbers using brackets (12,5). But why the separator and the brackets still not appear in when I made preview ?</p>