PSLE
Lynn wanted to buy a vest. She saw a black vest on sale at 10% discount and a white vest at 25% discount. Both vests had the same original price before the discounts. To buy the black vest, Lynn would need $6.30 more that what she had. So Lynn bought the white vest. After that, she had $6 left.

1. What was the original price of the black vest?
2. How much money did Lynn have at first?

	Black vest	White vest
Before	100%	100%
Change	- 10%	- 25%
After	90%	75%

(a)
Difference in the discount between the black vest and the white vest
= 25% - 10%
= 15%

Additional amount that Lynn needed to pay if she would buy the black vest
= 6.30 + 6
= $12.30

15% →  12.30
100% → ^12.30₁₅ x 100 = 82

Original price of the black vest = $82

(b)
Price of the white vest after discount in percentage
= 100% - 25%
= 75%

Price of the white vest after discount
= ⁷⁵₁₀₀ x 82
= $61.50

Amount that Lynn had at first
= 61.50 + 6
= $67.50

Answer(s): (a) $82; (b) $67.50