PSLE A bookstore 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.
- Julie's books were priced at $19 and $33. How much did she pay for them?
- Flynn paid a total of $42.85 for his two books. He paid $3.65 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% $33 |
100% $19 |
|
Discount |
- 25% |
- 30% |
|
Sale price |
75% |
70% |
? |
(a)
Selling price of the 1st book
= 75% x 33
=
75100 x 33
= $24.75
Selling price of 2nd book
= 70% x 19
=
70100 x 19
= $13.30
Total amount that Julie paid
= 24.75 + 13.30
= $38.05
|
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 + $3.65 |
1 u |
$42.85 |
(b)
Sale price of the 1st book = 1 u + 3.65
Sale price of the 2nd book = 1 u
Total amount that Flynn paid
= 1 u + 3.65 + 1 u
= 2 u + 3.65
2 u + 3.65 = 42.85
2 u = 42.85 - 3.65
2 u = 39.20
1 u = 39.20 ÷ 2 = 19.60
Sale price of the 2nd book = $19.60
70% of the price = $19.60
100% of the price =
19.6070 x 100 = $28
Selling price of the 2nd book before discount = $28
Answer(s): (a) $38.05; (b) $28