Final answer:
To calculate the discount percentage of Alexandria's coupon, divide the savings by the original price and then multiply by 100. Alexandria saved $10 on a $40 item, which means the coupon was for a 25% discount.
Step-by-step explanation:
Alexandria buys an item with a normal price of $40 but saves $10 by using a coupon. To find the percentage discount the coupon represents, you can use the following formula:
Percentage Discount = (Savings ÷ Original Price) × 100%
Inserting the numbers into the formula gives us:
Percentage Discount = ($10 ÷ $40) × 100%
Percentage Discount = (0.25) × 100%
Percentage Discount = 25%
The coupon Alexandria used is for a 25% discount off the normal price of the item.