Percentage in Totals / Grand Totals

I have 2 columns on a report (in reports builder) that have numbers - total touched & total count. I am calculating the percentage done with the following formula: ROUND(((PP_TOUCHED / PP_TOTAL) * 100),2). This works fine for the detail lines, but I can't get the correct percentage in the grand totals.
Also, when I use the above formula and one of the numbers is zero, I get an error.
Kris

I have 2 columns on a report (in reports builder)
that have numbers - total touched & total count. I
am calculating the percentage done with the following
formula: ROUND(((PP_TOUCHED / PP_TOTAL) * 100),2).
This works fine for the detail lines, but I can't
get the correct percentage in the grand totals.How are you calculating the percentage for grand total? Create a formula column at report level and use summary columns in the formula to calculate percentage.
Also, when I use the above formula and one of the
numbers is zero, I get an error.
It may help:
ROUND(decode(nvl(PP_TOTAL,0),0,((PP_TOUCHED / PP_TOTAL) * 100)),2)

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