PSLE
Winnie wanted to buy a dress. She saw a gold dress on sale at 20% discount and a red dress at 40% discount. Both dresses had the same original price before the discounts. To buy the gold dress, Winnie would need $6.40 more that what she had. So Winnie bought the red dress. After that, she had $15 left.

1. What was the original price of the gold dress?
2. How much money did Winnie have at first?

	Gold dress	Red dress
Before	100%	100%
Change	- 20%	- 40%
After	80%	60%

(a)
Difference in the discount between the gold dress and the red dress
= 40% - 20%
= 20%

Additional amount that Winnie needed to pay if she would buy the gold dress
= 6.40 + 15
= $21.40

20% →  21.40
100% → ^21.40₂₀ x 100 = 107

Original price of the gold dress = $107

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

Price of the red dress after discount
= ⁶⁰₁₀₀ x 107
= $64.20

Amount that Winnie had at first
= 64.20 + 15
= $79.20

Answer(s): (a) $107; (b) $79.20