Compute lequals=left parenthesis startfraction k over 100 endfraction right parenthesis times n k 100•n, where n is the total number of values in the data set and k is the percentile being used. l is a locator that gives the position pk, the kth percentile. if l is a whole number, the value of the kth percentile is midway between the lth value and the next value in the sorted set of data. if l is not a whole number, change it by rounding up to the next largest whole number, and the value of the kth percentile is this value.