Question

7 целых 3/4 - 3 целых 5/6

Answer 1

7 3/4 = 7 9/12                3 5/6 = 3 10/12
7 9/12 - 3 10/12 = 
=3 целых 11/12

Answer 2

7 целых 3/4 - 3 целых 5/6 = 31/4-23/6 = (186-92)/24 = 3 целых 11/12