## Elementary Technical Mathematics

$\frac{3}{16}$ in
Lets consider the thickness of the steel plates are $\frac{7}{16}$ in and $\frac{5}{8}$ in therefore the difference in thickness = $\frac{5}{8}$ - $\frac{7}{16}$ =$\frac{5}{8}\times$ $\frac{2}{2}$ - $\frac{7}{16}$ =$\frac{10}{16}$ - $\frac{7}{16}$ =$\frac{3}{16}$ in