yes to 1 and 1 fifth (1 1/5)
No
Take its reciprocal, and then simplify it
1 over 4
Five over six 5/6
6/15 = 2/5
4 and 1/2
No, 5/8 cannot be simplified.
Eight and five over six plus six and three over eight = 365/24 or 155/24
5/12 is in its simplest form.
1/6
13/10
2/3