title: If value = null then " " else value SSRS EXPRESSION issues
body: <p>value 1 is a retail price decimal value 2 is the difference between 2 retail costs both are decimals </p>
  
  <pre><code>=IIF(Fields!Prorated.Value is null,"",Fields!Prorated.Value)-Fields!Retail.Value fixxed !!!
  </code></pre>
  
  <p>Fixxed ^^</p>
  
  <pre><code>=IIF(IsNothing(Fields!Prorated.Value),"",(Fields!Prorated.Value-Fields!CurrentRetailPrice.Value)/Fields!Prorated.Value)
  </code></pre>
  
  <p>Failed ^^ this one is shown as a % difference</p>
  
  <p>this has not worked what would be another way around this</p>