# 2.2.9 - Percentiles

2.2.9 - PercentilesThere are slightly different definitions of **percentiles **and different statistical software and textbooks may use different formulas. In this course, we will be using the definition from your textbook:

- Percentile
- Proportion of a distribution less than a given value.

## Example: Test Scores

Test scores are often reported in terms of percentiles. For example, if a student scores in the 90th percentile on a test then he or she scored better than 90% of students who took the test.