All right so we have
$$3\frac{1}{3} = \frac{9}{3}+\frac{1}{3} = \frac{10}{3} = \frac{10*5}{3*5} = \frac{50}{15}$$
and
$$4\frac{4}{5} = \frac{20}{5}+\frac{4}{5} = \frac{24}{5} = \frac{24*3}{5*3} = \frac{72}{15}$$
Then
$$\frac{\frac{50}{15}}{\frac{72}{15}} = \frac{50}{72} = \frac{25}{36}$$
Reinout