diff --git a/map-number-range.md b/map-number-range.md
index adce7616d..b67f8c4da 100644
--- a/map-number-range.md
+++ b/map-number-range.md
@@ -1,8 +1,8 @@
 ### mapNumRange
 
-Maps a number range to another number range.
+Maps a number from one range to another range.
 
-Returns a number mapped from the in range to the out range. 
+Returns a mapped num from the in range to the out range. 
 
 ```js
 const mapNumRange = (num, in_min, in_max, out_min, out_max) => {