PSLE A store is having a book sale.
The 1st book is at 10% discount.
The 2nd book is at 35% discount.
The price of the 2nd book should be equal or lower than the price of the 1st book.
Abi and Jeremy each bought two books at the sale.
- Abi's books were priced at $6 and $14. How much did she pay for them?
- Jeremy paid a total of $44.40 for his two books. He paid $13.20 more for the 1st book than the 2nd book. What was the price of the 2nd book before discount?
|
1st book |
2nd book |
Total amount |
Original price
|
100% $14 |
100% $6 |
|
Discount |
- 10% |
- 35% |
|
Sale price |
90% |
65% |
? |
(a)
Selling price of the 1st book
= 90% x 14
=
90100 x 14
= $12.60
Selling price of 2nd book
= 65% x 6
=
65100 x 6
= $3.90
Total amount that Abi paid
= 12.60 + 3.90
= $16.50
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 10% |
- 35% |
|
Sale price |
90%
|
65%
|
|
Compare 1st book and 2nd book |
1 u + $13.20 |
1 u |
$44.40 |
(b)
Sale price of the 1st book = 1 u + 13.20
Sale price of the 2nd book = 1 u
Total amount that Jeremy paid
= 1 u + 13.20 + 1 u
= 2 u + 13.20
2 u + 13.20 = 44.40
2 u = 44.40 - 13.20
2 u = 31.20
1 u = 31.20 ÷ 2 = 15.60
Sale price of the 2nd book = $15.60
65% of the price = $15.60
100% of the price =
15.6065 x 100 = $24
Selling price of the 2nd book before discount = $24
Answer(s): (a) $16.50; (b) $24