PSLE A store 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.
- Hilda's books were priced at $13 and $27. How much did she pay for them?
- Wesley paid a total of $43.90 for his two books. He paid $13.10 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% $27 |
100% $13 |
|
Discount |
- 5% |
- 30% |
|
Sale price |
95% |
70% |
? |
(a)
Selling price of the 1st book
= 95% x 27
=
95100 x 27
= $25.65
Selling price of 2nd book
= 70% x 13
=
70100 x 13
= $9.10
Total amount that Hilda paid
= 25.65 + 9.10
= $34.75
|
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 + $13.10 |
1 u |
$43.90 |
(b)
Sale price of the 1st book = 1 u + 13.10
Sale price of the 2nd book = 1 u
Total amount that Wesley paid
= 1 u + 13.10 + 1 u
= 2 u + 13.10
2 u + 13.10 = 43.90
2 u = 43.90 - 13.10
2 u = 30.80
1 u = 30.80 ÷ 2 = 15.40
Sale price of the 2nd book = $15.40
70% of the price = $15.40
100% of the price =
15.4070 x 100 = $22
Selling price of the 2nd book before discount = $22
Answer(s): (a) $34.75; (b) $22