Chapter 8

Amber bought a helmet for \$40.
Ike bought gloves and front lights for a total of \$40.50.
Tiffany bought front lights and a saddlebag for \$46.50.

Step 1
Find the sale price of each item.

 Item Original Price Percent Discount Discount Amount Sale Price Helmet \$50.00 20% \$10.00 \$40.00 Biking gloves \$20.00 10% \$2.00 \$18.00 Front lights \$25.00 10% \$2.50 \$22.50 Rear saddlebags \$30.00 20% \$6.00 \$24.00

Step 2
Guess and Check

Amber's one item cost about the same amount as the two items that Ike bought. Amber probably bought the most expensive item—the helmet, for \$40.00.

If Amber bought the helmet and Ike spent \$0.50 more than she did, Ike's two items must have cost \$40.50.

One of Ike's items must have been the front lights, since the lights are the only item whose price includes \$0.50.

To find the other item Ike bought, subtract the cost of the lights, \$22.50, from the total amount he spent, \$40.50.
\$40.50
–22.50
\$18.00

Ike's second item must have been biking gloves.

Since Tiffany got \$3.50 back from \$50.00, her two items cost a total of \$46.50. She must have bought front lights, since they are the only item in which the price includes \$0.50.

To find the other item Tiffany bought, subtract the cost of the lights, \$22.50, from the total amount that she spent, \$46.50.
\$46.50
–22.50
\$24.00

Tiffany's second item must have been the rear saddlebag.

Step 3
Find the cost of each purchase.

 Name Items and Cost of Each Total Amber Helmet for \$40 \$40.00 Ike Biking gloves for \$18.00Front lights for \$22.50 \$40.50 Tiffany Front lights for \$22.50Rear saddlebags for \$24.00 \$46.50