Update percentile.md

2017-12-13 22:23:43 +11:00
parent 32d182d1f6
commit b9edc9a852
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--- a/snippets/percentile.md
+++ b/snippets/percentile.md
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 ### Percentile

-Use `Array.filter()` to calculate how many numbers are below the value and how many are the same value and
+Use `Array.reduce()` to calculate how many numbers are below the value and how many are the same value and
 apply the percentile formula.

 ```js