Use Percentages is only available under certain conditions: 

1. The Value Charted must be using the Requested Amount or Grant Amount as its Column.

2. The 'Group By' filter must be a Coding Sheet with Track Percentages enabled. To enable Track Percentages:
​​​​A) Go to Admin > Classifications
B) Search for the Coding Sheet you wish to add Track Percentages to in the list and double-click to open it
C) With the Coding Sheet open check to make sure that the Max. Number of Values is greater than 1
D) Mark the checkbox for Track Percentages >Alert throws > Proceed > Save and Close

Use Percentages