percantages of the values in the same group (Variance Problem)

[cuneyt]

I'd like to see percantages of the values in the same group?

We can call that percantage change...

Example:
Group Footer1: Sum of Ado.Duration = 85, day1
Sum of Ado.Duration = 68, day2 20 %
Sum of Ado.Duration = 50, day3 26.4%
Sum of Ado.Duration = 75, day4 -50 %

Formulas are ((day1 - day2) * 100) / day1
(( 85 - 68 ) * 100) / 85 = 20
or
Formulas are ((day2 - day3) * 100) / day1
Formulas are ((day3 - day4) * 100) / day1
goes like that

Thanx
Cuneyt