PSLE
Cindy wanted to buy a blouse. She saw a silver blouse on sale at 25% discount and a black blouse at 40% discount. Both blouses had the same original price before the discounts. To buy the silver blouse, Cindy would need $8.30 more that what she had. So Cindy bought the black blouse. After that, she had $4 left.

1. What was the original price of the silver blouse?
2. How much money did Cindy have at first?

	Silver blouse	Black blouse
Before	100%	100%
Change	- 25%	- 40%
After	75%	60%

(a)
Difference in the discount between the silver blouse and the black blouse
= 40% - 25%
= 15%

Additional amount that Cindy needed to pay if she would buy the silver blouse
= 8.30 + 4
= $12.30

15% →  12.30
100% → ^12.30₁₅ x 100 = 82

Original price of the silver blouse = $82

(b)
Price of the black blouse after discount in percentage
= 100% - 40%
= 60%

Price of the black blouse after discount
= ⁶⁰₁₀₀ x 82
= $49.20

Amount that Cindy had at first
= 49.20 + 4
= $53.20

Answer(s): (a) $82; (b) $53.20