Jasper report - calculation & Variable Expression

I am using i-report tool for reports in my application. I am doing totals for some fields and want to use these grand totals to calculate the value of some other variable.

E.G.

I have x,y,z fields. x1,y1 as totals. x1, y1 are variables. Now, I want to use x1 and y1 to calculate the value of Z1 which is not toal, but result of some expression.

like.. Z1= (x1/y1)*100

I think I can keep this expression in properties of Z1 in 'variable expression' but what I should set as 'Calculation'.

Please help. It is urgent.

http://www.coderanch.com/how-to/java/PatienceIsAVirtue

More important than patience, even, is choosing the right forum. I couldn't figure out how this related to JSF and chances are that no one else here could either. Always look for the forum where the experts in your question hang out.

I thought I would get somebody who knows Jasper report.. as I was in hurry... but anyway I got the solution by myself..

But thanks for pointing it to..

It is good habit of replying to as many people as you can.. ;-)