Subtracting Fractions by Boxed Rockets

\frac{2}{5} - \frac{1}{5}

\frac{1}{5}

\frac{2}{3} - \frac{1}{3}

\frac{1}{3}

\frac{7}{9} - \frac{6}{9}

\frac{1}{9}

\frac{7}{8} - \frac{2}{3}

\frac{5}{24}

\frac{1}{2} - \frac{3}{10}

\frac{2}{10} = \frac{1}{5}

\frac{2}{5} - \frac{3}{8}

\frac{1}{40}