\[25\ :\left( 2\frac{5}{11} - \frac{7}{11} \right) = 25\ :\left( \frac{27}{11} - \frac{7}{11} \right) =\]
\[= 25\ :\frac{20}{11} = 25 \cdot \frac{11}{20} = \frac{25 \cdot 11}{20} = \frac{55}{4} = 13\frac{3}{4}\]
\[Ответ:13\frac{3}{4}.\]