(3 целых 3/4*3/4-8 целых 4/9: 3 целых 4/5+1 целая 1/2: 27): 1 целая 39/48 надо

( 3 3/4 х 3/4 - 8 4/9 : 3 4/5 + 1 1/2 : 27) : 1 39/48 = 31/87

1) 3 3/4 х3/4 = 15/4 х 3/4 = 45/16
2) 8 4/9 : 3 4/5 = 76/9 : 19/5 = 76/9 х 5/19 = 20/9
3) 1 1/2 : 27 = 3/2 : 27 = 3/2 х 1/27 = 1/18
4) 45/16 - 20/9 = 85/144
5) 85/144 + 1/18 = 93/144
6) 93/144 : 1 39/48 = 93/144 : 87/48 = 93/144 х 48/87 = 31/87