diff --git a/guide/english/certifications/javascript-algorithms-and-data-structures/functional-programming/use-the-reduce-method-to-analyze-data/index.md b/guide/english/certifications/javascript-algorithms-and-data-structures/functional-programming/use-the-reduce-method-to-analyze-data/index.md
index 445b7189b4..e135ba75c7 100644
--- a/guide/english/certifications/javascript-algorithms-and-data-structures/functional-programming/use-the-reduce-method-to-analyze-data/index.md
+++ b/guide/english/certifications/javascript-algorithms-and-data-structures/functional-programming/use-the-reduce-method-to-analyze-data/index.md
@@ -120,11 +120,18 @@ var watchList = [
 ];
 
 // Add your code below this line
-
-var averageRating = watchList.filter(x => x.Director === "Christopher Nolan").map(x => Number(x.imdbRating)).reduce((x1, x2) => x1 + x2) / watchList.filter(x => x.Director === "Christopher Nolan").length;
+var averageRating = watchList
+  // Use filter to find films directed by Christopher Nolan
+  .filter(film => film.Director === "Christopher Nolan")
+  // Use map to convert their ratings from strings to numbers
+  .map(film => Number(film.imdbRating))
+  // Use reduce to add together their ratings
+  .reduce((sumOfRatings, rating) => sumOfRatings + rating) 
+  // Divide by the number of Nolan films to get the average rating 
+  / watchList.filter(film => film.Director === "Christopher Nolan").length;
 
 // Add your code above this line
 
-console.log(averageRating); 
+console.log(averageRating);
 
 ```