diff --git a/mapNumRange.md b/mapNumRange.md
index 5b90907e0..37661778a 100644
--- a/mapNumRange.md
+++ b/mapNumRange.md
@@ -2,7 +2,7 @@
 
 Maps a number from one range to another range.
 
-Returns `num` mapped between `out_min` to `out_max` from `in_min` to `in_max` 
+Returns `num` mapped between `out_min`-`out_max` from `in_min`-`in_max` 
 ```js
 const distance = (num, in_min, in_max, out_min, out_max) => (num - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
 ```