Answer
$\frac{5}{12}\gt\frac{3}{8}$
Work Step by Step
We can rewrite $\frac{5}{12}=\frac{5\times2}{12\times2}=\frac{10}{24}$ and $\frac{3}{8}=\frac{3\times3}{8\times3}=\frac{9}{24}$.
$\frac{10}{24}$ is greater than $\frac{9}{24}$, because its numerator is greatest while both denominators are the same
Therefore, $\frac{5}{12}\gt\frac{3}{8}$.