Question

In a certain​ chemical, the ratio of zinc to copper is 4 to 15. A jar of the chemical contains 375 grams of copper. How many grams of zinc does it​ contain?

Answer 1

Answer: 93 grams Zinc

Explanation:

3 Zinc : 13 Copper

x 31 x 31

93 Zinc, 403 Copper

or

set up a proportion, cross multiply, and solve for the variable:

3(403) = 13(x)

3(31) = x

93 = x

Answer 2

100 Grams of Zinc

Explanation:

15 divided by 4 is 3.75.

375 divided by 3.75 is 100.

100 grams Zinc.