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 coin is copper?
16/25 = 0.64 = 64%
To find the percentage of the metal in the coin that is copper, we need to calculate the ratio of the weight of copper to the total weight of the coin and then multiply it by 100.
Weight of copper = 16 grams
Total weight of the coin = 25 grams
Percentage of copper = (Weight of copper / Total weight of the coin) * 100
= (16 / 25) * 100
= 64
Therefore, the percentage of the metal in the coin that is copper is 64%.
To find the percentage of copper in the coin, we need to determine the weight of copper relative to the total weight of the coin and then convert it to a percentage.
First, we find the weight of copper in the coin. It is given that the total weight of the coin is 25 grams. Since the coin contains 9 grams of nickel, the weight of copper can be calculated by subtracting the weight of nickel from the total weight:
Weight of copper = Total weight of the coin - Weight of nickel
Weight of copper = 25 grams - 9 grams
Weight of copper = 16 grams
Now we know the weight of copper in the coin is 16 grams.
Next, we can calculate the percentage of copper in the coin:
Percentage of copper = (Weight of copper / Total weight of the coin) * 100
Percentage of copper = (16 grams / 25 grams) * 100
Now, let's perform the calculation:
Percentage of copper = (16 / 25) * 100
Percentage of copper = 0.64 * 100
Percentage of copper = 64%
Therefore, the percentage of copper in the coin is 64%.