Rael and Justin went to buy massage chairs at a sale. The usual price of 1 massage chair was $500 each.

SALE
Buy 1 massage chair at 15% discount
Buy 2 or more massage chairs at 30% discount each

1. Rael bought 1 massage chair. How much did he pay?
2. What is the maximum number of massage chairs Justin can buy if he has $2000?

(a)
Discounted price of 1 massage chair in percent if only 1 was bought
= 100% - 15%
= 85%

100% of 1 massage chair = 500
1% of 1 massage chair = 500 ÷ 100 = 5
85% of 1 massage chair = 85 x 5 = 425 

Amount that Rael paid for 1 massage chair = $425

(b)
Discounted price of 1 massage chair in percent if more than 1 was bought
= 100% - 30%
= 70%

70% of 1 massage chair = 70 x 5 = 350

Amount that Justin paid for 1 massage chair = $350

Maximum number of massage chairs that Justin can buy if he has $2000
= 2000 ÷ 350
= 5 r 250

Answer(s): (a) $425; (b) 5