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.
Nicole and Jeremy each bought two books at the sale.
- Nicole's books were priced at $3 and $18. How much did she pay for them?
- Jeremy paid a total of $47.95 for his two books. He paid $11.55 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% $18 |
100% $3 |
|
Discount |
- 15% |
- 30% |
|
Sale price |
85% |
70% |
? |
(a)
Selling price of the 1st book
= 85% x 18
=
85100 x 18
= $15.30
Selling price of 2nd book
= 70% x 3
=
70100 x 3
= $2.10
Total amount that Nicole paid
= 15.30 + 2.10
= $17.40
|
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 + $11.55 |
1 u |
$47.95 |
(b)
Sale price of the 1st book = 1 u + 11.55
Sale price of the 2nd book = 1 u
Total amount that Jeremy paid
= 1 u + 11.55 + 1 u
= 2 u + 11.55
2 u + 11.55 = 47.95
2 u = 47.95 - 11.55
2 u = 36.40
1 u = 36.40 ÷ 2 = 18.20
Sale price of the 2nd book = $18.20
70% of the price = $18.20
100% of the price =
18.2070 x 100 = $26
Selling price of the 2nd book before discount = $26
Answer(s): (a) $17.40; (b) $26