PSLE A stationery shop is having a book sale.
The 1st book is at 25% discount.
The 2nd book is at 40% discount.
The price of the 2nd book should be equal or lower than the price of the 1st book.
Hazel and Carl each bought two books at the sale.
- Hazel's books were priced at $22 and $26. How much did she pay for them?
- Carl paid a total of $31.65 for his two books. He paid $8.85 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% $26 |
100% $22 |
|
Discount |
- 25% |
- 40% |
|
Sale price |
75% |
60% |
? |
(a)
Selling price of the 1st book
= 75% x 26
=
75100 x 26
= $19.50
Selling price of 2nd book
= 60% x 22
=
60100 x 22
= $13.20
Total amount that Hazel paid
= 19.50 + 13.20
= $32.70
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 25% |
- 40% |
|
Sale price |
75%
|
60%
|
|
Compare 1st book and 2nd book |
1 u + $8.85 |
1 u |
$31.65 |
(b)
Sale price of the 1st book = 1 u + 8.85
Sale price of the 2nd book = 1 u
Total amount that Carl paid
= 1 u + 8.85 + 1 u
= 2 u + 8.85
2 u + 8.85 = 31.65
2 u = 31.65 - 8.85
2 u = 22.80
1 u = 22.80 ÷ 2 = 11.40
Sale price of the 2nd book = $11.40
60% of the price = $11.40
100% of the price =
11.4060 x 100 = $19
Selling price of the 2nd book before discount = $19
Answer(s): (a) $32.70; (b) $19