PSLE
Cindy wanted to buy a shirt. She saw a blue shirt on sale at 20% discount and a silver shirt at 40% discount. Both shirts had the same original price before the discounts. To buy the blue shirt, Cindy would need $8.40 more that what she had. So Cindy bought the silver shirt. After that, she had $11 left.

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

	Blue shirt	Silver shirt
Before	100%	100%
Change	- 20%	- 40%
After	80%	60%

(a)
Difference in the discount between the blue shirt and the silver shirt
= 40% - 20%
= 20%

Additional amount that Cindy needed to pay if she would buy the blue shirt
= 8.40 + 11
= $19.40

20% →  19.40
100% → ^19.40₂₀ x 100 = 97

Original price of the blue shirt = $97

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

Price of the silver shirt after discount
= ⁶⁰₁₀₀ x 97
= $58.20

Amount that Cindy had at first
= 58.20 + 11
= $69.20

Answer(s): (a) $97; (b) $69.20