PSLE
Joelle wanted to buy a skirt. She saw a brown skirt on sale at 20% discount and a black skirt at 40% discount. Both skirts had the same original price before the discounts. To buy the brown skirt, Joelle would need $4.20 more that what she had. So Joelle bought the black skirt. After that, she had $10 left.

1. What was the original price of the brown skirt?
2. How much money did Joelle have at first?

	Brown skirt	Black skirt
Before	100%	100%
Change	- 20%	- 40%
After	80%	60%

(a)
Difference in the discount between the brown skirt and the black skirt
= 40% - 20%
= 20%

Additional amount that Joelle needed to pay if she would buy the brown skirt
= 4.20 + 10
= $14.20

20% →  14.20
100% → ^14.20₂₀ x 100 = 71

Original price of the brown skirt = $71

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

Price of the black skirt after discount
= ⁶⁰₁₀₀ x 71
= $42.60

Amount that Joelle had at first
= 42.60 + 10
= $52.60

Answer(s): (a) $71; (b) $52.60