Решение

1. $$2\frac{11}{12} = \frac{2 \cdot 12 + 11}{12} = \frac{24 + 11}{12} = \frac{35}{12}$$
2. $$\frac{35}{12} : \frac{7}{18} = \frac{35}{12} \cdot \frac{18}{7} = \frac{35 \cdot 18}{12 \cdot 7} = \frac{5 \cdot 3}{2 \cdot 1} = \frac{15}{2}$$
3. $$14 - \frac{15}{2} = \frac{14 \cdot 2 - 15}{2} = \frac{28 - 15}{2} = \frac{13}{2}$$
4. $$4\frac{7}{8} = \frac{4 \cdot 8 + 7}{8} = \frac{32 + 7}{8} = \frac{39}{8}$$
5. $$\frac{13}{2} : \frac{39}{8} = \frac{13}{2} \cdot \frac{8}{39} = \frac{13 \cdot 8}{2 \cdot 39} = \frac{1 \cdot 4}{1 \cdot 3} = \frac{4}{3} = 1\frac{1}{3}$$