Simple percentage does not calculate

[Jon_BCV]

Hi..
I have the following expression in a field in a group footer

=sum(fields.DysfuncCount)/Sum(fields.ActiveCount)

But it always returns  0

DysFuncCount is 30     ActiveCount is 139

What am I doing wrong?

thx

[Jon_BCV]

Guess I have to cast it.....................
=CDbl(sum(fields.DysfuncCount))/CDbl(Sum(fields.ActiveCount))