Answer
Each piece of fuel line will be $\frac{23}{8}$ feet long.
Work Step by Step
The piece of fuel line is 5$\frac{3}{4}$ feet long, or $\frac{23}{4}$ feet long. He needs to cut it into 2 equal pieces.
So, we divide $\frac{23}{4}$ by 2:
$\frac{23}{4}$ $\div$ 2 = $\frac{23}{4}$ $\times$ $\frac{1}{2}$ =
$\frac{23}{8}$
Each piece of fuel line will be $\frac{23}{8}$ feet long.