$\frac{7}{12} = \frac{7 * 3}{12 * 3} = \frac{21}{36}$;
$\frac{7}{11}$ − невозможно;
$\frac{7}{10}$ − невозможно;
$\frac{7}{9} = \frac{7 * 4}{9 * 4} = \frac{28}{36}$;
$\frac{7}{8}$ − невозможно;
$\frac{7}{7} = \frac{36}{36}$;
$\frac{7}{6} = \frac{7 * 6}{6 * 6} = \frac{42}{36}$;
$\frac{7}{5}$ − невозможно;
$\frac{7}{4} = \frac{7 * 9}{4 * 9} = \frac{63}{36}$;
$\frac{7}{3} = \frac{7 * 12}{3 * 12} = \frac{84}{36}$;
$\frac{7}{2} = \frac{7 * 18}{2 * 18} = \frac{126}{36}$.