Matrix Percentage Column ( Column 2 vs Column 1)

Need help with calculating percentage column in a matrix.

2005 2006

Jan 10 15

Feb 20 25

Need to add column showing variance :

Var Var

Jan 10 15 50%

Feb 20 25 25%

Any help would be appreciated....

Hi. Did you manage to get the result.I also have the similar case. If you have solved can you plz help me out.