Answer
Add $\frac{1}{2}$ to both sides to isolate the variable.
Work Step by Step
$m-\frac{1}{2}\lt\frac{3}{8}$
$m-\frac{1}{2}+\frac{1}{2}\lt\frac{3}{8}+\frac{1}{2}$
$m-\frac{1}{2}+\frac{1}{2}\lt\frac{3}{8}+\frac{4}{8}$
$m\lt\frac{7}{8}$
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