PSLE Emily bought 2 fans of the same model at a sale. She paid $102.85 for them.
- What was the price of the fan before discount?
- Billy also bought 2 such fans at the price before discount. How much more did Billy pay than Emily?
|
Fan 1 |
Fan 2 |
Total |
Before |
100% |
100% |
200% |
Change (Discount) |
- 45% |
- 70% |
|
After |
55% |
30% |
85% |
(a)
Amount that Emily paid for the 2 fans in percent
= 55% + 30%
= 85%
85% → 102.85
1% → 102.85 ÷ 85 = 1.21
100% → 100 x 1.21 = $121
Price of the fan before discount = $121
(b)
Amount that Billy paid more than Emily
= 45% + 70%
= 115%
= 115 x 1.21
= $139.15
Answer(s): (a) $121; (b) $139.15