PSLE
Zara wanted to buy a dress. She saw a grey dress on sale at 15% discount and a green dress at 30% discount. Both dresses had the same original price before the discounts. To buy the grey dress, Zara would need $4.30 more that what she had. So Zara bought the green dress. After that, she had $2 left.

1. What was the original price of the grey dress?
2. How much money did Zara have at first?

	Grey dress	Green dress
Before	100%	100%
Change	- 15%	- 30%
After	85%	70%

(a)
Difference in the discount between the grey dress and the green dress
= 30% - 15%
= 15%

Additional amount that Zara needed to pay if she would buy the grey dress
= 4.30 + 2
= $6.30

15% →  6.30
100% → ^6.30₁₅ x 100 = 42

Original price of the grey dress = $42

(b)
Price of the green dress after discount in percentage
= 100% - 30%
= 70%

Price of the green dress after discount
= ⁷⁰₁₀₀ x 42
= $29.40

Amount that Zara had at first
= 29.40 + 2
= $31.40

Answer(s): (a) $42; (b) $31.40