Set 4: Percentages

Explanation

Answer: A

A book originally costs $100. It is on sale for 20% off. What is the sale price?

✓ Correct

Detailed Explanation

Choice A is correct. 1. Original price: $100 Discount: 20% ×$ 100 = $20 Sale price:$ 100 - $20 =$ 80 Therefore, the sale price is $80.

Key Steps:

•

Apply the appropriate mathematical formula

•

The correct answer is 80

Why others are wrong:

B: This would give an incorrect result. Choice B is incorrect and may result from a calculation error.

C: This would give an incorrect result. Choice C is incorrect and may result from a calculation error.

D: This would give an incorrect result. Choice D is incorrect and may result from a calculation error.

Master all sections for your best SAT score