Question

28,8:13 5/7+6,6:2/3
________________
1 11/16:2,25

Answer 1

28 4/5 : 13 5/7 + 6 3/5 * 3/2 = 
144/5 * 7/96 + 33/5 * 2/3 = 
21/10+22/5=
21/10+44/10=
55/10=5,5

1 11/16 : 2,25=1 11/16 : 2 1/4=27/16 *4/9=3/4=0,75