PSLE A bookstore is having a book sale.
The 1st book is at 5% 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.
Jaslyn and Brandon each bought two books at the sale.
- Jaslyn's books were priced at $28 and $28. How much did she pay for them?
- Brandon paid a total of $56.40 for his two books. He paid $15.80 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% $28 |
100% $28 |
|
Discount |
- 5% |
- 30% |
|
Sale price |
95% |
70% |
? |
(a)
Selling price of the 1st book
= 95% x 28
=
95100 x 28
= $26.60
Selling price of 2nd book
= 70% x 28
=
70100 x 28
= $19.60
Total amount that Jaslyn paid
= 26.60 + 19.60
= $46.20
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 5% |
- 30% |
|
Sale price |
95%
|
70%
|
|
Compare 1st book and 2nd book |
1 u + $15.80 |
1 u |
$56.40 |
(b)
Sale price of the 1st book = 1 u + 15.80
Sale price of the 2nd book = 1 u
Total amount that Brandon paid
= 1 u + 15.80 + 1 u
= 2 u + 15.80
2 u + 15.80 = 56.40
2 u = 56.40 - 15.80
2 u = 40.60
1 u = 40.60 ÷ 2 = 20.30
Sale price of the 2nd book = $20.30
70% of the price = $20.30
100% of the price =
20.3070 x 100 = $29
Selling price of the 2nd book before discount = $29
Answer(s): (a) $46.20; (b) $29