Math
posted by AK .
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

Can D really be right? The original piece weighs 200 pounds. How can 5.25% of that be more than you started with?

I don't understand . That means i got the wrong answer.

is C the right answer?

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. 
Nickel is correct.