PSLE
Cindy wanted to buy a windbreaker. She saw a blue windbreaker on sale at 10% discount and a yellow windbreaker at 20% discount. Both windbreakers had the same original price before the discounts. To buy the blue windbreaker, Cindy would need $9.10 more that what she had. So Cindy bought the yellow windbreaker. After that, she had $14 left.

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

	Blue windbreaker	Yellow windbreaker
Before	100%	100%
Change	- 10%	- 20%
After	90%	80%

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

Additional amount that Cindy needed to pay if she would buy the blue windbreaker
= 9.10 + 14
= $23.10

10% →  23.10
100% → ^23.10₁₀ x 100 = 231

Original price of the blue windbreaker = $231

(b)
Price of the yellow windbreaker after discount in percentage
= 100% - 20%
= 80%

Price of the yellow windbreaker after discount
= ⁸⁰₁₀₀ x 231
= $184.80

Amount that Cindy had at first
= 184.80 + 14
= $198.80

Answer(s): (a) $231; (b) $198.80