PERCENTILE function

Returns the k-th percentile of values in a range


 * PERCENTILE(array,k)
 * Array - the array or range of data that defines relative standing.
 * K - the percentile value in the range 0..1, inclusive.
 * If k is nonnumeric, PERCENTILE returns the #VALUE! error value.
 * If k is 1, PERCENTILE returns the #NUM! error value.
 * If k is not a multiple of 1/(n - 1), PERCENTILE interpolates to determine the value at the k-th percentile.