PSLE Risa bought 2 fans of the same model at a sale. She paid $67.20 for them.
- What was the price of the fan before discount?
- Eric also bought 2 such fans at the price before discount. How much more did Eric pay than Risa?
|
Fan 1 |
Fan 2 |
Total |
Before |
100% |
100% |
200% |
Change (Discount) |
- 10% |
- 70% |
|
After |
90% |
30% |
120% |
(a)
Amount that Risa paid for the 2 fans in percent
= 90% + 30%
= 120%
120% → 67.20
1% → 67.20 ÷ 120 = 0.56
100% → 100 x 0.56 = $56
Price of the fan before discount = $56
(b)
Amount that Eric paid more than Risa
= 10% + 70%
= 80%
= 80 x 0.56
= $44.80
Answer(s): (a) $56; (b) $44.80