Howard and Oscar went to buy projectors at a sale. The usual price of 1 projector was $200 each.

SALE
Buy 1 projector at 5% discount
Buy 2 or more projectors at 10% discount each

1. Howard bought 1 projector. How much did he pay?
2. What is the maximum number of projectors Oscar can buy if he has $6000?

(a)
Discounted price of 1 projector in percent if only 1 was bought
= 100% - 5%
= 95%

100% of 1 projector = 200
1% of 1 projector = 200 ÷ 100 = 2
95% of 1 projector = 95 x 2 = 190 

Amount that Howard paid for 1 projector = $190

(b)
Discounted price of 1 projector in percent if more than 1 was bought
= 100% - 10%
= 90%

90% of 1 projector = 90 x 2 = 180

Amount that Oscar paid for 1 projector = $180

Maximum number of projectors that Oscar can buy if he has $6000
= 6000 ÷ 180
= 33 r 60

Answer(s): (a) $190; (b) 33