Set 4: Percentages

Explanation

Answer: C

A book originally costs $320. It is on sale for 50% off. What is the sale price?

170

150

160

✓ Correct

Detailed Explanation

Choice C is correct. 1. Original price: $320 Discount: 50% ×$ 320 = $160 Sale price:$ 320 - $160 =$ 160 Therefore, the sale price is $160.

Key Steps:

•

Apply the appropriate mathematical formula

•

The correct answer is 160

Why others are wrong:

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

B: This would give an incorrect result. Choice B 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.

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