I have two columns on which i have to calculate percent difference.

Column A and Column B

What cal i can use that to find: A-B/ A+B or

A/sum(A)- % for A

B/ sum(B)- % for B

then Difference A-B  or is there any other way to do that?

Also tried the inbuilt percent difference function but not sure how to use that?

Have anyone done this before?

Thanks

Akrati