PSLE A stationery kiosk is having a book sale.
The 1st book is at 25% discount.
The 2nd book is at 30% discount.
The price of the 2nd book should be equal or lower than the price of the 1st book.
Fanny and Albert each bought two books at the sale.
- Fanny's books were priced at $14 and $22. How much did she pay for them?
- Albert paid a total of $29.15 for his two books. He paid $5.35 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% $22 |
100% $14 |
|
Discount |
- 25% |
- 30% |
|
Sale price |
75% |
70% |
? |
(a)
Selling price of the 1st book
= 75% x 22
=
75100 x 22
= $16.50
Selling price of 2nd book
= 70% x 14
=
70100 x 14
= $9.80
Total amount that Fanny paid
= 16.50 + 9.80
= $26.30
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 25% |
- 30% |
|
Sale price |
75%
|
70%
|
|
Compare 1st book and 2nd book |
1 u + $5.35 |
1 u |
$29.15 |
(b)
Sale price of the 1st book = 1 u + 5.35
Sale price of the 2nd book = 1 u
Total amount that Albert paid
= 1 u + 5.35 + 1 u
= 2 u + 5.35
2 u + 5.35 = 29.15
2 u = 29.15 - 5.35
2 u = 23.80
1 u = 23.80 ÷ 2 = 11.90
Sale price of the 2nd book = $11.90
70% of the price = $11.90
100% of the price =
11.9070 x 100 = $17
Selling price of the 2nd book before discount = $17
Answer(s): (a) $26.30; (b) $17