5 4/7-(2,5+1 1/3):1/3

1)2,5+1 1/3 = 5/2 + 4/3 = 15/6 + 8/6=23/6
2) 23/6:1/3 = 23/6 * 3/1 = 23/2=11 1/2
3) 5 4/7 - 11 1/2 = 5 8/14 - 11 7/14 = -(10 21/14 - 5 8/14)= - 5 13/14
ответ: -5 13/14