5/6
-1/2
0.25
12/30 = 2/5
5 20ths in its simplest form is 1 4th, or 1 over 4, or 1/4.
2 and 4/5ths is the same as 2 and 16/20ths. 1 and 1/4th is the same as 1 and 5/20ths. So if you add 2 and 16/20ths to 1 and 5/20ths you get 3 and 21/20ths which is the same as 4 and 1/20th.
Yes.
No, 1 5th is 1/5 = 0.2. 10 20ths is 10/20 = 0/5 (or a half).
Exactly as it is 5/44 which can't be simplified any further
5/20 = 1/4.
As 5 and 7 have no common factor other than 1, 5/7 is as simple as it gets.
4/20 = 1/5 or 0.2