You write 2.875 as a mixed number as: 27/8
85/8 as a mixed number is 10 and 5/8.
29 over 8 as a mixed number = 35/8
1/8
10 over 8 as a mixed number = 11/4
8.2 written as a mixed number is 8 and 2/10
3.08 written as a mixed number is 3 and 8/100
8.58 written as a mixed number is 8 and 58/100
You write it as 811/100.
8 is an integer and so cannot be written as a mixed number. There isn't really a fraction form, but at a pinch you could write it as 8/1.
3 and 5/8
3 and 7/8