Срочно помогите !! Дам 20?баллов

Question

Срочно помогите !! Дам 20?баллов

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Answer 1

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

1) 7 1/6 - 6 = 1 1/6

2) 1/3 - 1/7 = 7/21 - 3/21 = 4/21

3).7/6 * 4/21 = 2/9