Set 2: Percentages

Explanation

Answer: A

A watch originally costs $90. It is on sale for 50% off. What is the sale price?

✓ Correct

Detailed Explanation

Choice A is correct. 1. Original price: $90 Discount: 50% ×$ 90 = $45 Sale price:$ 90 - $45 =$ 45 Therefore, the sale price is $45.

Key Steps:

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Apply the appropriate mathematical formula

•

The correct answer is 45

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.

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