finding a rational number between 2 given numbers

what is between 3/8 and 4/6?

ANSWER: 7/24 but answers will vary.

$\begin{array}{rcl} 0.2916\overline{6} &=& \frac{7}{24} \qquad | \qquad \text{wrong answer }? \\\\ \\ \hline \\ 0.3750 &=& \frac{3}{8} \\\\ 0.52083\overline{3} &=& \frac{1}{2}\cdot \left( \frac{3}{8}+\frac{4}{6} \right) =\mathbf{ \frac{25}{48} }\qquad | \qquad \text{solution} \\\\ 0.6\overline{6} &=& \frac{4}{6} \\\\ \end{array}$