м) $$ \frac{1}{112} $$ и $$ \frac{3}{28} $$.
$$ \frac{1}{112} = \frac{1 \cdot 1}{112 \cdot 1} = \frac{1}{112} $$ $$ \frac{3}{28} = \frac{3 \cdot 4}{28 \cdot 4} = \frac{12}{112} $$
Ответ: $$ \frac{1}{112} $$ и $$ \frac{12}{112} $$