PSLE Erika bought 2 fans of the same model at a sale. She paid $72.60 for them.
- What was the price of the fan before discount?
- Harry also bought 2 such fans at the price before discount. How much more did Harry pay than Erika?
|
Fan 1 |
Fan 2 |
Total |
Before |
100% |
100% |
200% |
Change (Discount) |
- 20% |
- 70% |
|
After |
80% |
30% |
110% |
(a)
Amount that Erika paid for the 2 fans in percent
= 80% + 30%
= 110%
110% → 72.60
1% → 72.60 ÷ 110 = 0.66
100% → 100 x 0.66 = $66
Price of the fan before discount = $66
(b)
Amount that Harry paid more than Erika
= 20% + 70%
= 90%
= 90 x 0.66
= $59.40
Answer(s): (a) $66; (b) $59.40