Set 5: Percentages

Explanation

Answer: D

A phone originally costs $400. It is on sale for 10% off. What is the sale price?

370

180

350

360

✓ Correct

Detailed Explanation

Choice D is correct. 1. Original price: $400 Discount: 10% ×$ 400 = $40 Sale price:$ 400 - $40 =$ 360 Therefore, the sale price is $360.

Key Steps:

•

Apply the appropriate mathematical formula

•

The correct answer is 360

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.

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

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