Question

The ratio of zinc to copper is 3:19,
if theres 741 copper how much zinc is there?

Answer 1

117

Explanation:

For every 3 zinc there would be 19 copper, and for every 19 copper there would be 3 zinc. There are 741 copper, so there would be 741 * 3 / 19 zinc, which turns out to be 117 zinc.