PSLE A book shop is having a book sale.
The 1st book is at 15% 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.
Olivia and Sean each bought two books at the sale.
- Olivia's books were priced at $13 and $19. How much did she pay for them?
- Sean paid a total of $26.95 for his two books. He paid $8.75 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% $19 |
100% $13 |
|
Discount |
- 15% |
- 35% |
|
Sale price |
85% |
65% |
? |
(a)
Selling price of the 1st book
= 85% x 19
=
85100 x 19
= $16.15
Selling price of 2nd book
= 65% x 13
=
65100 x 13
= $8.45
Total amount that Olivia paid
= 16.15 + 8.45
= $24.60
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 15% |
- 35% |
|
Sale price |
85%
|
65%
|
|
Compare 1st book and 2nd book |
1 u + $8.75 |
1 u |
$26.95 |
(b)
Sale price of the 1st book = 1 u + 8.75
Sale price of the 2nd book = 1 u
Total amount that Sean paid
= 1 u + 8.75 + 1 u
= 2 u + 8.75
2 u + 8.75 = 26.95
2 u = 26.95 - 8.75
2 u = 18.20
1 u = 18.20 ÷ 2 = 9.10
Sale price of the 2nd book = $9.10
65% of the price = $9.10
100% of the price =
9.1065 x 100 = $14
Selling price of the 2nd book before discount = $14
Answer(s): (a) $24.60; (b) $14