2.4 11 77

$${\frac{2}{11}} : {\frac{4}{77}} = {\frac{2}{11}} \cdot {\frac{77}{4}} = {\frac{2\cdot77}{11\cdot4}} = {\frac{2\cdot11\cdot7}{11\cdot2\cdot2}} = {\frac{7}{2}} = 3{\frac{1}{2}}$$

Ответ: 3 1/2