PSLE
Penelope wanted to buy a blouse. She saw a yellow blouse on sale at 10% discount and a purple blouse at 20% discount. Both blouses had the same original price before the discounts. To buy the yellow blouse, Penelope would need $5.70 more that what she had. So Penelope bought the purple blouse. After that, she had $6 left.

1. What was the original price of the yellow blouse?
2. How much money did Penelope have at first?

	Yellow blouse	Purple blouse
Before	100%	100%
Change	- 10%	- 20%
After	90%	80%

(a)
Difference in the discount between the yellow blouse and the purple blouse
= 20% - 10%
= 10%

Additional amount that Penelope needed to pay if she would buy the yellow blouse
= 5.70 + 6
= $11.70

10% →  11.70
100% → ^11.70₁₀ x 100 = 117

Original price of the yellow blouse = $117

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

Price of the purple blouse after discount
= ⁸⁰₁₀₀ x 117
= $93.60

Amount that Penelope had at first
= 93.60 + 6
= $99.60

Answer(s): (a) $117; (b) $99.60