PSLE
Kathy wanted to buy a shirt. She saw a grey shirt on sale at 20% discount and a brown shirt at 35% discount. Both shirts had the same original price before the discounts. To buy the grey shirt, Kathy would need $9.60 more that what she had. So Kathy bought the brown shirt. After that, she had $18 left.

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

	Grey shirt	Brown shirt
Before	100%	100%
Change	- 20%	- 35%
After	80%	65%

(a)
Difference in the discount between the grey shirt and the brown shirt
= 35% - 20%
= 15%

Additional amount that Kathy needed to pay if she would buy the grey shirt
= 9.60 + 18
= $27.60

15% →  27.60
100% → ^27.60₁₅ x 100 = 184

Original price of the grey shirt = $184

(b)
Price of the brown shirt after discount in percentage
= 100% - 35%
= 65%

Price of the brown shirt after discount
= ⁶⁵₁₀₀ x 184
= $119.60

Amount that Kathy had at first
= 119.60 + 18
= $137.60

Answer(s): (a) $184; (b) $137.60