Syntax: @PERCENTRANK(R, N)
R - A range of data
N - A number whose percentile rank to find
@PERCENTRANK returns the percentile rank of the number N among the values in range R.
Examples:
@PERCENTRANK(A1..A6, 4.5) = 0.7, where A1..A6 = 1, 2, 3, 4, 5, 6
@PERCENTRANK(B1..B6, 21.35) = 0.77, where B1..B8 = 3.8, 23, 4, 12, 67, 0.2