Following the tutorial https://www.youtube.com/watch?v=u3rylF3y3og&ab_channel=TraversyMedia

I'm coding something that has a Star review feature. I want to change the width (through document.querySelector('').style.width = starPercentage) of elements to determine how many stars a review gave:

function getRatings() {
      for (let rating in ratings) {
        // Get percentage
        const starPercentage = (ratings[rating] / starsTotal) * 100;

        // Round to nearest 10
        const starPercentageRounded = `${Math.round(starPercentage / 10) * 10}%`;

        // Set width of stars-inner to percentage
        document.querySelector(`.${rating} .stars-inner`).style.width = starPercentageRounded;

        // Add number rating
        document.querySelector(`.${rating} .number-rating`).innerHTML = ratings[rating];
     }
}

But instead of the hard-coded values I'm getting the data from mongoose and express. What's the best way to manipulate the stars of each review?