I have 2 columns.
In column A the contents are X, Y or Z only.
In column B a range of rounded values from +3.00 to -3.00.
I want to display the %age of X for each value in column B (and then filter
and graph the results from Column C).

ie
A B C
.... ...... .......
X 1.20
Y 1.20
X 1.20
Z 1.20
X 1.20 60%
X 1.30

I can't figure the syntax (or maybe I should modify a SubTotal ??)
Any Help gratefully received.