PSLE A stationery shop is having a book sale.
The 1st book is at 5% 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.
Fanny and Riordan each bought two books at the sale.
- Fanny's books were priced at $14 and $17. How much did she pay for them?
- Riordan paid a total of $51.60 for his two books. He paid $16.80 less for the 2nd book than the 1st book. What was the price of the 2nd book before discount?
|
1st book |
2nd book |
Total amount |
Original price
|
100% $17 |
100% $14 |
|
Discount |
- 5% |
- 40% |
|
Sale price |
95% |
60% |
? |
(a)
Selling price of the 1st book
= 95% x 17
=
95100 x 17
= $16.15
Selling price of 2nd book
= 60% x 14
=
60100 x 14
= $8.40
Total amount that Fanny paid
= 16.15 + 8.40
= $24.55
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 5% |
- 40% |
|
Sale price |
95%
|
60%
|
|
Compare 1st book and 2nd book |
1 u + $16.80 |
1 u |
$51.60 |
(b)
Sale price of the 1st book = 1 u + 16.80
Sale price of the 2nd book = 1 u
Total amount that Riordan paid
= 1 u + 16.80 + 1 u
= 2 u + 16.80
2 u + 16.80 = 51.60
2 u = 51.60 - 16.80
2 u = 34.80
1 u = 34.80 ÷ 2 = 17.40
Sale price of the 2nd book = $17.40
60% of the price = $17.40
100% of the price =
17.4060 x 100 = $29
Selling price of the 2nd book before discount = $29
Answer(s): (a) $24.55; (b) $29