There's no option to calculate the percent of a subtotal in a pivot
table. You could do the calculation outside of the PivotTable.
Or, if you have two fields in the row area, and set the data field to
show % of Column, the result may be similar to this:
Region Product Sales (% of Col)
East Chair 20.00%
Table 25.00%
East Total 45.00%
West Chair 40.00%
Table 15.00%
West Total 55.00%
Grand Total 100.00%
Each product shows as a percent of the overall total, instead of a
percent of its region.
If you move Region to the Column area, the products will show as a
percent of the region's total:
Sales (%Col) Region
Product East West Grand Total
Chair 44.44% 72.73% 60.00%
Table 55.56% 27.27% 40.00%
Grand Total 100.00% 100.00% 100.00%