Sam is stocking up on canned tuna. He got 9 cans at the supermarket, and had 5 coupons for 25 cents off a single can per coupon. He paid $20 and got $5.50 in change. How many cents does a can of tuna cost? Let's be accurate as possible.
His total without the coupons was $20 - $5.50 = $14.50. He had 5 coupons that each saved him 25 cents, so the full price of all the tuna is $14.50 + 5 * $0.25 = $15.75. He bought 9 cans of tuna, so each can costs $15.75 / 9 = $1.75. As 1 dollar has 100 cents 1.75 * 100 = 175 cents.
The answer: 175.