Calculated percentage field in a pivot table
 

This is a part of the pivot table

Year Class average of subtot sum of accounts

2002 1 126631 18759
2 126631 19103
3 126631 59277
4 126631 24416
5 126631 5076


How can I insert a field to get the percentage? I have tried but I get the
wrong answer.

cheers!