$\frac{8}{10} = $ $\frac{4}{5}$
$\frac{4}{6} = $ $\frac{2}{3}$
$\frac{6}{8} = $ $\frac{3}{4}$
$\frac{10}{12} = $ $\frac{5}{6}$
$\frac{9}{12} = $ $\frac{3}{4}$
$\frac{12}{16} = $ $\frac{3}{4}$
$\frac{14}{16} = $ $\frac{7}{8}$
$\frac{15}{20} = $ $\frac{3}{4}$
$\frac{12}{18} = $ $\frac{2}{3}$
$\frac{18}{24} = $ $\frac{3}{4}$
$\frac{20}{25} = $ $\frac{4}{5}$
$\frac{21}{28} = $ $\frac{3}{4}$
$\frac{24}{30} = $ $\frac{4}{5}$
$\frac{25}{50} = $ $\frac{1}{2}$
$\frac{30}{36} = $ $\frac{5}{6}$
$\frac{16}{32} = $ $\frac{1}{2}$
$\frac{1}{2} = \frac{?}{8}$ $4$
$\frac{2}{3} = \frac{?}{9}$ $6$
$\frac{3}{4} = \frac{9}{?}$ $12$
$\frac{1}{5} = \frac{?}{20}$ $4$
$\frac{5}{6} = \frac{10}{?}$ $12$
$\frac{3}{5} = \frac{?}{15}$ $9$
$\frac{4}{7} = \frac{8}{?}$ $14$
$\frac{2}{5} = \frac{?}{25}$ $10$