77 11 65 / 25 13 7 =

\( \frac{77}{25} : \frac{11}{13} : \frac{65}{7} = \frac{77}{25} \times \frac{13}{11} \times \frac{7}{65} = \frac{77 \times 13 \times 7}{25 \times 11 \times 65} = \frac{7007}{17875} = \frac{91}{231} = \frac{7}{17.76} \)

Ответ: \( \frac{7}{17.76} \)