Ethan and Cody went to buy computers at a sale. The usual price of 1 computer was $200 each.
SALEBuy 1 computer at 15% discount
Buy 2 or more computers at 20% discount each
- Ethan bought 1 computer. How much did he pay?
- What is the maximum number of computers Cody can buy if he has $2000?
(a)
Discounted price of 1 computer in percent if only 1 was bought
= 100% - 15%
= 85%
100% of 1 computer = 200
1% of 1 computer = 200 ÷ 100 = 2
85% of 1 computer = 85 x 2 = 170
Amount that Ethan paid for 1 computer = $170
(b)
Discounted price of 1 computer in percent if more than 1 was bought
= 100% - 20%
= 80%
80% of 1 computer = 80 x 2 = 160
Amount that Cody paid for 1 computer = $160
Maximum number of computers that Cody can buy if he has $2000
= 2000 ÷ 160
= 12 r 80
Answer(s): (a) $170; (b) 12