What is the % composition of alloy containing 23.20lb lead, 10.40lb tin, 6.00lb antimony, and 0.40lb copper?

Question

What is the percentage composition of alloy containing 23.20lb lead, 10.40lb tin, 6.00lb antimony, and 0.40lb copper?

Answer 1

I don't feel like doing the math for you...

First, add up the metals to find the total weight
23.20 + 10.40 + 6.00 + 0.40 = X

Then,
23.20/X*100 = % comp Lead
10.40/X*100 = % comp tin
6.00/X*100 = % comp Sb
0.04/X*100 = % comp Cu