PSLE
Tina wanted to buy a jacket. She saw a silver jacket on sale at 10% discount and a black jacket at 20% discount. Both jackets had the same original price before the discounts. To buy the silver jacket, Tina would need $4.20 more that what she had. So Tina bought the black jacket. After that, she had $14 left.

1. What was the original price of the silver jacket?
2. How much money did Tina have at first?

	Silver jacket	Black jacket
Before	100%	100%
Change	- 10%	- 20%
After	90%	80%

(a)
Difference in the discount between the silver jacket and the black jacket
= 20% - 10%
= 10%

Additional amount that Tina needed to pay if she would buy the silver jacket
= 4.20 + 14
= $18.20

10% →  18.20
100% → ^18.20₁₀ x 100 = 182

Original price of the silver jacket = $182

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

Price of the black jacket after discount
= ⁸⁰₁₀₀ x 182
= $145.60

Amount that Tina had at first
= 145.60 + 14
= $159.60

Answer(s): (a) $182; (b) $159.60