I m using report builder and when i m have a fomulae of calculated field is: iif(calc.totalrevenue er 0,0,100*(calc.totaldollars/calc.totalrevenue)) i got an invalid coldfusion expression error i know that is becoz of '/' division sign b'coz when i remove it and calc.totalrevenue it works fine. calc.totaldollars=query.first+query.second+query.third calc.totalrevenue=query.costperunit*query.AP plz tell me where i m wrong