Question

помогите пожалуйстаааа с решением

Answer 1

1) 12/35 : 2/5 = 12/35×5/2 = 60/70 = 6/7
2) 15/17 : 5 = 15/17 : 5/1 = 15/17×1/5 = 15/85 = 3/17
3) 4 : 20/21 = 4/1 : 20/21 = 4/1×21/20 = 84/20 21/5 = 4 1/5 = 4.2
4) 8 3/4 : 2 1/3 = 35/4:7/3 = 35/4×3/7 = 105/28 = 3 21/28 = 3 3/4 = 3.75