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.
Gem and Brandon each bought two books at the sale.
- Gem's books were priced at $6 and $15. How much did she pay for them?
- Brandon paid a total of $46.45 for his two books. He paid $3.05 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% $15 |
100% $6 |
|
Discount |
- 25% |
- 30% |
|
Sale price |
75% |
70% |
? |
(a)
Selling price of the 1st book
= 75% x 15
=
75100 x 15
= $11.25
Selling price of 2nd book
= 70% x 6
=
70100 x 6
= $4.20
Total amount that Gem paid
= 11.25 + 4.20
= $15.45
|
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 + $3.05 |
1 u |
$46.45 |
(b)
Sale price of the 1st book = 1 u + 3.05
Sale price of the 2nd book = 1 u
Total amount that Brandon paid
= 1 u + 3.05 + 1 u
= 2 u + 3.05
2 u + 3.05 = 46.45
2 u = 46.45 - 3.05
2 u = 43.40
1 u = 43.40 ÷ 2 = 21.70
Sale price of the 2nd book = $21.70
70% of the price = $21.70
100% of the price =
21.7070 x 100 = $31
Selling price of the 2nd book before discount = $31
Answer(s): (a) $15.45; (b) $31