Ребята, помогите решить пример:

(1/2+2/3) * 6/7-2/3:3=?

Пример решается с дробями

(1/2+2/3) * 6/7-2/3:3 = (3/6 + 4/6) * 6/7 - 2/3 * 1/3 = 7/6 * 6/7 - 2/9 = 1 - 2/9 = 9/9 - 2/9 = 7/9

1) 1/2 + 2/3 = 3/6 + 4/6 = 7/6

2) 7/6 * 6/7 = 1

3) 2/3 : 3 = 2/3 * 1/3 = 2/9

4) 1 - 2/9 = 9/9 - 2/9 = 7/9