Question

billy would like to buy a mattress with an original price of $860. which coupon should he use?
45% off any item!
save $400 on one purchase of $750 or more

Explanation:

Step1: Calculate 45% off discount

Discount amount: $860 \times 0.45 = 387$
Final price: $860 - 387 = 473$

Step2: Calculate $400 off discount

Final price: $860 - 400 = 460$

Step3: Compare final prices

$460 < 473$, so the $400 off coupon is better.

Answer:

Billy should use the "Save $400 on one purchase of $750 or more" coupon.