12) 0,14 - $$ \frac{1}{8} $$ = $$ \frac{14}{100} $$ - $$ \frac{1}{8} $$ = $$ \frac{7}{50} $$ - $$ \frac{1}{8} $$ = $$ \frac{7 \cdot 4 - 1 \cdot 25}{200} $$ = $$ \frac{28 - 25}{200} $$ = $$ \frac{3}{200} $$
Ответ: $$ \frac{3}{200} $$