• Hope this will help you

    =IIf(IsNothing(Fields!field1.Value)Or IsNothing(Fields!field2.Value) ,0,((Fields!field1.Value)/(Fields!field2.Value)*100))

    If you are not clear, revert back to me

    -----------------------------------------------------------------------------------------------------------------------------------------------------------
    Please feel free to let me know if you are not clear or I’ve misunderstood anything.

    Thanks,
    Arunkumar S P