\( \frac{1}{4} - 2 \frac{7}{7} = \frac{1}{4} - 3 = \frac{1}{4} - \frac{3 \cdot 4}{4} = \frac{1}{4} - \frac{12}{4} = \frac{-11}{4} = -2 \frac{3}{4} \)
Ответ: \(-2 \frac{3}{4}\)