Hi,
I don't know how you have built your report, but maybe if you used XL cell references instead of the tuple?
So something like
=IF(b2=0,"",c2/b2)
Or maybe
=IF(EPMTUPLE([TIME].[H1].[2014.Q1];[CATEGORY].[H1].[ACTUAL])=0,"",EPMTUPLE([TIME].[H1].[2014.Q1];[CATEGORY].[H1].[BUDGET])/EPMTUPLE([TIME].[H1].[2014.Q1];[CATEGORY].[H1].[ACTUAL])/100)
BR,
Arnold