PSLE
Yen wanted to buy a vest. She saw a white vest on sale at 10% discount and a brown vest at 30% discount. Both vests had the same original price before the discounts. To buy the white vest, Yen would need $8.20 more that what she had. So Yen bought the brown vest. After that, she had $20 left.

1. What was the original price of the white vest?
2. How much money did Yen have at first?

	White vest	Brown vest
Before	100%	100%
Change	- 10%	- 30%
After	90%	70%

(a)
Difference in the discount between the white vest and the brown vest
= 30% - 10%
= 20%

Additional amount that Yen needed to pay if she would buy the white vest
= 8.20 + 20
= $28.20

20% →  28.20
100% → ^28.20₂₀ x 100 = 141

Original price of the white vest = $141

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

Price of the brown vest after discount
= ⁷⁰₁₀₀ x 141
= $98.70

Amount that Yen had at first
= 98.70 + 20
= $118.70

Answer(s): (a) $141; (b) $118.70