Can someone help me ... converting this to a SSRS expression? if round({CARBON},0) = 0 then 0 else (round({CARBON4},0)/round({CARBON},0)) * 100 FM

Farhan, You can use a combination of the IIF and CLng functions. e.g. =IIF(CLng(Fields!Carbon.Value)=0, 0, CLng(Fields!Carbon4.Value) / CLng(Fields!Carbon.Value) * 100) However, I am unclear why you are wanting to round the values to 0 decimal places. e.g. If Carbon is 0.4 and Carbon4 is 0.3, do you really want to return 0 instead of 75? The above expression should give an equivalent result to the Crystal expression. However, you may want to consider using just this one: =IIF(Fields!Carbon.Value=0, 0.0, Fields!Carbon4.Value / Fields!Carbon.Value * 100) It's possible it may reduce some false negatives in your report. Note: you could also remove the * 100 and format the cell as %. Thanks. Malcolm Stewart