GridCalculatedColumn does not provide a proper calculation for percentages of an aggregate footer row.
For example, I have 4 rows of percentages (0%, 50%, 100%, 100%) calculated from Row1 / TotalsColumn, and the footer row percentage shows up as 250% if I set the property Aggregate="Sum".
The Row1 values (0,1,1,3) total to 5, the TotalsColumn values (1,2,1,3) total to 7. This calculates to 71.43%.
Please provide an appropriate answer.