calculateTotal

Source Code

/**
 * Calculates the total price after applying a percentage discount.
 *
 * @param {number} price - The original price of the item.
 * @param {number} discountPercent - The discount to apply, expressed as a
 *   percentage (e.g. 20 for 20%).
 * @return {number} The final price after the discount has been applied.
 *
 * @example
 * // A $100 item with a 20% discount costs $80.
 * calculateTotal(100, 20); // => 80
 */
function calculateTotal(price, discountPercent) {
  return price * (1 - discountPercent / 100);
}