Set 4: Percentages

Explanation

Answer: D

A watch originally costs $220. It is on sale for 10% off. What is the sale price?

208

188

198

✓ Correct

Detailed Explanation

Choice D is correct. 1. Original price: $220 Discount: 10% ×$ 220 = $22 Sale price:$ 220 - $22 =$ 198 Therefore, the sale price is $198.

Key Steps:

•

Apply the appropriate mathematical formula

•

The correct answer is 198

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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