diff --git a/guide/english/algorithms/exponentiation/index.md b/guide/english/algorithms/exponentiation/index.md
index 811b24bea0..936ceb6458 100644
--- a/guide/english/algorithms/exponentiation/index.md
+++ b/guide/english/algorithms/exponentiation/index.md
@@ -38,7 +38,7 @@ int power(int x, unsigned int y) {
 
 ## Modular Exponentiation
 
-Given three numbers x, y and p, compute (x^y) % p
+Given three numbers x, y, and p, compute (x^y) % p
 
 ```C
 int power(int x, unsigned int y, int p) {