a)5 5/8 : 2 13/16=?
в)7/8 : 8/3=?
г)6 5/8 : 2 3/4=?

5 5/8 : 2 13/16 = 45/8 : 45/16 = 45/8 * 16/45 = 16/8 = 2
7/8 : 8/3 = 7/8 * 3/8 = 21/64
6 5/8 : 2 3/4 = 53/8 : 11/4 = 53/8 * 4/11 = 53/2 * 2/11 = 106/22 = 4 18/22 = 
= 4  9/11