A coin contains 9 grams of nickel and 16 grams of copper, for a total weight of 25 grams. What percentage of the metal in the co
in is copper?
2 answers:
Answer:
64% of the metal in the coin is copper.
Step-by-step explanation:
A coin contains nickel = 9 grams
and copper = 16 grams.
Total weight of the coin = 16 + 9 = 25 grams
Now we have to calculate the percentage of copper in the coin.
Therefore,
× 100
= 0.64 × 100
= 64%
Hence 64% of the metal in the coin is copper.
To find the percentage, we take the amount of copper and divide it by the total weight. In this case, there are 16 grams of copper.
16/25 is 0.64.
The answer is 64 percent.
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