Subtracting Fractions by Boxed Rockets

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

\frac{1}{3}

\frac{3}{4} - \frac{1}{4}

\frac{2}{4} = \frac{1}{2}

\frac{5}{6} - \frac{4}{6}

\frac{1}{6}

\frac{14}{15} - \frac{7}{20}

\frac{35}{60} = \frac{7}{12}

\frac{11}{20} - \frac{1}{2}

\frac{1}{20}

\frac{3}{4} - \frac{8}{12}

\frac{1}{12}