Posted by **AK** on Wednesday, July 16, 2008 at 3:32pm.

A certain alloy contains 5.25% copper.

How much copper is there in a piece weighing 200 pound?

A)1.50 pounds

B)105 poounds

C)10.5 pounds

D)1050 pounds

i think its D am i right

- Math -
**DrBob222**, Wednesday, July 16, 2008 at 3:36pm
Can D really be right? The original piece weighs 200 pounds. How can 5.25% of that be more than you started with?

- Math -
**Nickel**, Wednesday, July 16, 2008 at 3:49pm
I see what you're thinking, you wanted to multiply 5.25 * 200, which would give you 1050. But that would be wrong.

What you need to realize is that the 5.25 is a percentage, so instead of multiplying 200 * 5.25, you need to multiply 200 * 0.0525 and you will get your answer.

- Math -
**DrBob222**, Wednesday, July 16, 2008 at 4:05pm
Nickel is correct.

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