PSLE
Betty wanted to buy a skirt. She saw a blue skirt on sale at 10% discount and a brown skirt at 20% discount. Both skirts had the same original price before the discounts. To buy the blue skirt, Betty would need $7.60 more that what she had. So Betty bought the brown skirt. After that, she had $19 left.

1. What was the original price of the blue skirt?
2. How much money did Betty have at first?

	Blue skirt	Brown skirt
Before	100%	100%
Change	- 10%	- 20%
After	90%	80%

(a)
Difference in the discount between the blue skirt and the brown skirt
= 20% - 10%
= 10%

Additional amount that Betty needed to pay if she would buy the blue skirt
= 7.60 + 19
= $26.60

10% →  26.60
100% → ^26.60₁₀ x 100 = 266

Original price of the blue skirt = $266

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

Price of the brown skirt after discount
= ⁸⁰₁₀₀ x 266
= $212.80

Amount that Betty had at first
= 212.80 + 19
= $231.80

Answer(s): (a) $266; (b) $231.80