PSLE A bookstore is having a book sale.
The 1st book is at 20% discount.
The 2nd book is at 35% discount.
The price of the 2nd book should be equal or lower than the price of the 1st book.
Tammy and Ivan each bought two books at the sale.
- Tammy's books were priced at $26 and $28. How much did she pay for them?
- Ivan paid a total of $33.15 for his two books. He paid $8.45 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% $28 |
100% $26 |
|
Discount |
- 20% |
- 35% |
|
Sale price |
80% |
65% |
? |
(a)
Selling price of the 1st book
= 80% x 28
=
80100 x 28
= $22.40
Selling price of 2nd book
= 65% x 26
=
65100 x 26
= $16.90
Total amount that Tammy paid
= 22.40 + 16.90
= $39.30
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 20% |
- 35% |
|
Sale price |
80%
|
65%
|
|
Compare 1st book and 2nd book |
1 u + $8.45 |
1 u |
$33.15 |
(b)
Sale price of the 1st book = 1 u + 8.45
Sale price of the 2nd book = 1 u
Total amount that Ivan paid
= 1 u + 8.45 + 1 u
= 2 u + 8.45
2 u + 8.45 = 33.15
2 u = 33.15 - 8.45
2 u = 24.70
1 u = 24.70 ÷ 2 = 12.35
Sale price of the 2nd book = $12.35
65% of the price = $12.35
100% of the price =
12.3565 x 100 = $19
Selling price of the 2nd book before discount = $19
Answer(s): (a) $39.30; (b) $19