The percentile rank of a data value is the percentage of data values that are less than or equal to that value.
40
Practice makes perfect
Percentiles separate data sets into 100 equal parts. The percentile rank of a data value is the percentage of data values that are less than or equal to that value.
Let's find the percentile rank of a score of 85. We know that 12 values out of the 30 total values are less than or equal to 85.
12/30 = 0.4 = 40 %
The percentile rank of a score of 85 is 40.
