diff --git a/exercises/practice/raindrops/.docs/instructions.md b/exercises/practice/raindrops/.docs/instructions.md
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 # Instructions
 
-Your task is to convert a number into a string that contains raindrop sounds corresponding to certain potential factors. A factor is a number that evenly divides into another number, leaving no remainder. The simplest way to test if a one number is a factor of another is to use the [modulo operation](https://en.wikipedia.org/wiki/Modulo_operation).
+Your task is to convert a number into a string that contains raindrop sounds corresponding to certain potential factors. A factor is a number that evenly divides into another number, leaving no remainder. The simplest way to test if a number is a factor of another is to use the [modulo operation](https://en.wikipedia.org/wiki/Modulo_operation).
 
 The rules of `raindrops` are that if a given number: