Помогите плиз!!! там где я обвёл кружком

Решите задачу:

$- 2 \frac{2}{7} + 4 \frac{3}{5} = - (2 + \frac{2}{7} ) + 4 + \frac{3}{5} = - 2 - \frac{2}{7} + 4 + \frac{3}{5} = ( - 2 + 4) + - \frac{2}{7} + \frac{3}{5} ) = 2 + \frac{11}{35} = 2 \frac{11}{35} \\ \\ \frac{5}{12} \times ( - 6) = - 2.5 \\ \\ - 16 \div ( - \frac{4}{9} ) = 16 \times \frac{9}{4} = 4 \times 9 = 36 \\ \\ 12 \frac{3}{8} - 5 \frac{1}{4} + 7 \frac{1}{2} = 12 + \frac{3}{8} - (5 + \frac{1}{4} ) + 7 + \frac{1}{2} = 12 + \frac{3}{8} - 5 - \frac{1}{4} + 7 + \frac{1}{2} = (12 - 5 + 7) + ( \frac{3}{8} - \frac{1}{4} + \frac{1}{2} ) = 14 + \frac{5}{8} = 14.625 \\ \\ 1 \frac{1}{6} \div 2 \frac{1}{6} \times 26 = \frac{7}{6} \div \frac{13}{6} \times 26 = \frac{7}{6} \times \frac{6}{13} \times 26 = 7 \times 2 = 14$