need help on pivot insert field calculation getting error of average calx of betw 2 colum

Dear Expert

I have excel sheet with pivot table, i have insert calculation field between (AY=RRR/AZ=RRR count column values) result not came as i expected from manual calculation...name it as loop (RRR/RRR Count) getting result in percentage) but But I Am Not Getting Exact Result It Showing Some Thing Else I Got Struck Where I Did Mistake In Calcuation

find the attachment u may understand what i expect....

thanks in advance

Any experts can help on this task?

need help experts??