PSLE A stationery kiosk is having a book sale.
The 1st book is at 15% 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.
Jen and Howard each bought two books at the sale.
- Jen's books were priced at $2 and $17. How much did she pay for them?
- Howard paid a total of $36.25 for his two books. He paid $9.65 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% $17 |
100% $2 |
|
Discount |
- 15% |
- 30% |
|
Sale price |
85% |
70% |
? |
(a)
Selling price of the 1st book
= 85% x 17
=
85100 x 17
= $14.45
Selling price of 2nd book
= 70% x 2
=
70100 x 2
= $1.40
Total amount that Jen paid
= 14.45 + 1.40
= $15.85
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 15% |
- 30% |
|
Sale price |
85%
|
70%
|
|
Compare 1st book and 2nd book |
1 u + $9.65 |
1 u |
$36.25 |
(b)
Sale price of the 1st book = 1 u + 9.65
Sale price of the 2nd book = 1 u
Total amount that Howard paid
= 1 u + 9.65 + 1 u
= 2 u + 9.65
2 u + 9.65 = 36.25
2 u = 36.25 - 9.65
2 u = 26.60
1 u = 26.60 ÷ 2 = 13.30
Sale price of the 2nd book = $13.30
70% of the price = $13.30
100% of the price =
13.3070 x 100 = $19
Selling price of the 2nd book before discount = $19
Answer(s): (a) $15.85; (b) $19