PSLE Lucy bought 2 fans of the same model at a sale. She paid $100.10 for them.
- What was the price of the fan before discount?
- Andy also bought 2 such fans at the price before discount. How much more did Andy pay than Lucy?
|
Fan 1 |
Fan 2 |
Total |
Before |
100% |
100% |
200% |
Change (Discount) |
- 35% |
- 55% |
|
After |
65% |
45% |
110% |
(a)
Amount that Lucy paid for the 2 fans in percent
= 65% + 45%
= 110%
110% → 100.10
1% → 100.10 ÷ 110 = 0.91
100% → 100 x 0.91 = $91
Price of the fan before discount = $91
(b)
Amount that Andy paid more than Lucy
= 35% + 55%
= 90%
= 90 x 0.91
= $81.90
Answer(s): (a) $91; (b) $81.90