Question

How many ounces of other metal must be added to 56 ounces of pure silver to make a composition that is 70% silver?

Please help me set this problem up

Answer 1

56/(56+x) = 70/100

silver/(silver + additive)
silver / total weight

is 70% or 70/100

56/(56+x) = .7

Cross multiply and solve for x

Answer 2

Thank you!

Answer 3

You are welcome.