Question

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?

Answer 1

64

Explanation:

We know that an entire coin (100%) left parenthesis, weighs 25 grams.

We need to find out what percent of the weight is 16 grams.

We know that the coin has 16 grams of copper, so we multiply 4% by 16 to find the percent of the coin represented by the 16 grams of copper.

64% of the metal in the coin is copper.

Answer 2

64

Explanation:

total=25

25×4=100

9×4=36 36% percent nickel

16×4=64% copper