Using standard Excel 2010 I am trying to calculate percent change from 2013 to 2014 and put that in a column after grand total.
The formula I am trying to use is (2013 - 2014) / 2013
I have tried Calculated Field but that hasn't worked, and I can't do Calculated Item since I grouped my dates to show in years instead of days.

This is what the source data looks like :

Any help is appreciated!