How to Calculate percentage

I want to calculate percentage into Lectora. I have a Variable named 'X', its value changes at run time dynamically. I want to divide this var by another var 'Y' which is storing a static numeric value. and i stored resultant of division into a Var 'Z'. Then I want to multiply 'Z' with another Var called 'A', which is storing a static value 100. I stored result of that multiplication into another var 'B'. but my final var 'B' is showing "Invalid". Please suggest! How to calculate percentage.Edited By: rishi.jha on 2008-11-13 2:2:6

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