The percentile rank calculator finds the percentile rank of a number in a data set.  The percentile rank of a number is the percent of values that are equal or less than that number.  First, enter the data set and data value for which you want to find the percentile rank.  You’ll get an answer, and then you will get a step by step explanation on how you can do it yourself.

The percentile rank calculator finds the percentile rank of a number in a data set.

Afterward, if you want to find a particular percentile in a data set, you can use the Percentile Formula Calculator.

Percentile Rank Formula Calculator


Solution:

In this problem, you want to find the percentile rank of the data value 291 in the data set. The percentile rank represents the percent of numbers in the data set that have value equal or less than 291.

Take note that there are 17 data values in this data set. It's helpful to sort them in ascending order.

$ 101, 102, 107, 114, 132, 147, 157, 170, 207, 229, 237, 245, 256, 267, 268, 280, 291 $

Of these 17 data values, 17 are less than or equal to the data value 291. To find the percentile rank of 291, apply the formula: $$ \text{percentile rank = } (\frac{L}{N})(100) $$ where L is the number of data values that are less than or equal to 291, and N is the size of the data set. Substituting in values for this problem, we have: $$ \text{percentile rank = } (\frac{17}{17})(100) $$ $$ \text{percentile rank = } ({1})(100) $$

Percentile ranks are always expressed as whole numbers. Evaluating the multiplication above and rounding to the nearest whole number we have: $$ \text{percentile rank = } {100}$$

Interpreting our answer, 100% of the numbers in the data set have values less than or equal to 291.

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