Question

Lucas bought a box of 56 nails. He used 3/4 of the nails in the box. How many nails did he use?

Answer 1

For this problem you will make this into a proportion...
The proportion will look like this

 x       3
---- = ----
56      4

The proportion can be solved by dividing 56 by 4 then multiplying by 3 
the answer for x is 42.