Japheth and David went to buy massage chairs at a sale. The usual price of 1 massage chair was $1200 each.

SALE
Buy 1 massage chair at 20% discount
Buy 2 or more massage chairs at 25% discount each

1. Japheth bought 1 massage chair. How much did he pay?
2. What is the maximum number of massage chairs David can buy if he has $6000?

(a)
Discounted price of 1 massage chair in percent if only 1 was bought
= 100% - 20%
= 80%

100% of 1 massage chair = 1200
1% of 1 massage chair = 1200 ÷ 100 = 12
80% of 1 massage chair = 80 x 12 = 960 

Amount that Japheth paid for 1 massage chair = $960

(b)
Discounted price of 1 massage chair in percent if more than 1 was bought
= 100% - 25%
= 75%

75% of 1 massage chair = 75 x 12 = 900

Amount that David paid for 1 massage chair = $900

Maximum number of massage chairs that David can buy if he has $6000
= 6000 ÷ 900
= 6 r 600

Answer(s): (a) $960; (b) 6