Rael and Paul went to buy hard drives at a sale. The usual price of 1 hard drive was $1000 each.

SALE
Buy 1 hard drive at 5% discount
Buy 2 or more hard drives at 10% discount each

1. Rael bought 1 hard drive. How much did he pay?
2. What is the maximum number of hard drives Paul can buy if he has $3000?

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

100% of 1 hard drive = 1000
1% of 1 hard drive = 1000 ÷ 100 = 10
95% of 1 hard drive = 95 x 10 = 950 

Amount that Rael paid for 1 hard drive = $950

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

90% of 1 hard drive = 90 x 10 = 900

Amount that Paul paid for 1 hard drive = $900

Maximum number of hard drives that Paul can buy if he has $3000
= 3000 ÷ 900
= 3 r 300

Answer(s): (a) $950; (b) 3