Answer
$\frac{4}{8}$
Work Step by Step
In order to add or subtract fractions, we need common denominators. Because 7/8 and 3/8 already have the same denominator, 8, we can subtract the numerators:
$ \frac{7}{8} - \frac{3}{8} = \frac{4}{8}$=$\frac{1}{2}$