(3/7-16/21)*(-16/7)+(11/15+0,3):(-62/5)

(3/7 - 16/21) * (-16/7) + (11/15 + 0,3) : (-62/5) = (3 * 3/21 - 16/21) * (-16/7) + (11/15 + 3/10) * (-5/62) = (9/21 - 16/21) * (-16/7) + (22/30 + 9/30) * (-5/62) = (- 7/21) * (-16/7) + 31/30 * (-5/62) = 7/21 * 16/7 - 31/30 * 5/62 = (7 * 16)/(21 * 7) - (31 * 5)/(30 * 62) = 16/21 - 1/12 = 4 * 16/84 - 7/84 = (64 - 7)/84 = 57/84.

Ответ: 57/84.