Answer
The length of the screw is $\frac{31}{40}$ inches.
Work Step by Step
$\frac{1}{8} + \frac{1}{4}+ \frac{2}{5}$
Find the LCM.
8 = 2 x 2 x 2
4 = 2 x 2
5 = 5
LCM = 2 x 2 x 2 x 5 = 40
Express as like fractions using LCM of 40, add
$\frac{5}{40} + \frac{10}{40}+ \frac{16}{40}$ = $\frac{31}{40}$
