PSLE
Min wanted to buy a windbreaker. She saw a red windbreaker on sale at 20% discount and a blue windbreaker at 30% discount. Both windbreakers had the same original price before the discounts. To buy the red windbreaker, Min would need $8.50 more that what she had. So Min bought the blue windbreaker. After that, she had $1 left.

1. What was the original price of the red windbreaker?
2. How much money did Min have at first?

	Red windbreaker	Blue windbreaker
Before	100%	100%
Change	- 20%	- 30%
After	80%	70%

(a)
Difference in the discount between the red windbreaker and the blue windbreaker
= 30% - 20%
= 10%

Additional amount that Min needed to pay if she would buy the red windbreaker
= 8.50 + 1
= $9.50

10% →  9.50
100% → ^9.50₁₀ x 100 = 95

Original price of the red windbreaker = $95

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

Price of the blue windbreaker after discount
= ⁷⁰₁₀₀ x 95
= $66.50

Amount that Min had at first
= 66.50 + 1
= $67.50

Answer(s): (a) $95; (b) $67.50