PSLE Shiyun bought 2 fans of the same model at a sale. She paid $72.90 for them.
- What was the price of the fan before discount?
- Brandon also bought 2 such fans at the price before discount. How much more did Brandon pay than Shiyun?
|
Fan 1 |
Fan 2 |
Total |
Before |
100% |
100% |
200% |
Change (Discount) |
- 35% |
- 75% |
|
After |
65% |
25% |
90% |
(a)
Amount that Shiyun paid for the 2 fans in percent
= 65% + 25%
= 90%
90% → 72.90
1% → 72.90 ÷ 90 = 0.81
100% → 100 x 0.81 = $81
Price of the fan before discount = $81
(b)
Amount that Brandon paid more than Shiyun
= 35% + 75%
= 110%
= 110 x 0.81
= $89.10
Answer(s): (a) $81; (b) $89.10