(-5/7) * 7 + 2 целых 3/7 * (-2 целых 1/14) = - 10 целых 3/98
1) (-5/7) * 7 = - 5
2) 2 3/7 * (-2 1/14) = 17/7 * (-29/14) = - 493/98 = - 5 целых 3/98
3) (-5) + (-5 3/98) = - 10 целых 3/98
Пояснения:
2 целых 3/7 = (2*7+3)/7 = 17/7
2 целых 1/14 = (2*14+1)/14 = 29/14