Решите пожалуйста 3/4•(5/9-2/3)

Решите задачу:

$\frac{3}{4} \times ( \frac{5}{9} - \frac{2}{3} ) = - \frac{1}{12} \\ \\ 1) \frac{5}{9} - \frac{2}{3} = \frac{5}{9} - \frac{6}{9} = - ( \frac{6}{9} - \frac{5}{9} ) = - \frac{1}{9} \\ \\ 2) \frac{3}{4} \times ( - \frac{1}{9} ) = - ( \frac{3}{4} \times \frac{1}{9} ) = - ( \frac{3 \times 1}{4 \times 9}) = - (\frac{1 \times 1}{4 \times 3}) = - \frac{1}{12}$