PSLETom bought one hi-fi system for $280 after a discount of 30%.
- What was the price of the hi-fi system before discount?
- He paid $129 for a computer. The total discount for the hi-fi system and computer was $141. What was the percentage discount given for the computer?
(a)
Price of the hi-fi system after the discount in percentage
= 100% - 30%
= 70%
70% of the price of the hi-fi system = 280
1% of the price of the hi-fi system = 280 ÷ 70 = 4
100% of the price of the hi-fi system = 100 x 4 = 400
Price of the hi-fi system before the discount = $400
(b)
Discount of the hi-fi system
= 400 - 280
= $120
Discount of the computer
= 141 - 120
= $21
Original price of the computer
= 129 + 21
= $150
Percentage discount of the computer
=
21150 x 100%
= 14%
Answer(s): (a) $400; (b) 14%