PSLE A stationery kiosk 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.
Sarah and Glen each bought two books at the sale.
- Sarah's books were priced at $33 and $34. How much did she pay for them?
- Glen paid a total of $29.85 for his two books. He paid $4.65 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% $34 |
100% $33 |
|
Discount |
- 25% |
- 40% |
|
Sale price |
75% |
60% |
? |
(a)
Selling price of the 1st book
= 75% x 34
=
75100 x 34
= $25.50
Selling price of 2nd book
= 60% x 33
=
60100 x 33
= $19.80
Total amount that Sarah paid
= 25.50 + 19.80
= $45.30
|
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 + $4.65 |
1 u |
$29.85 |
(b)
Sale price of the 1st book = 1 u + 4.65
Sale price of the 2nd book = 1 u
Total amount that Glen paid
= 1 u + 4.65 + 1 u
= 2 u + 4.65
2 u + 4.65 = 29.85
2 u = 29.85 - 4.65
2 u = 25.20
1 u = 25.20 ÷ 2 = 12.60
Sale price of the 2nd book = $12.60
60% of the price = $12.60
100% of the price =
12.6060 x 100 = $21
Selling price of the 2nd book before discount = $21
Answer(s): (a) $45.30; (b) $21