20 is an integer and not a fraction. However, it can be expressed in rational form as 20/1 which cannot be simplified.
20/1
39/20
3/20
1/20
11/20
35/100 is how to write 35% as a fraction, and if you reduce, you get 7/20.
20% = 1⁄5
0.25
10 and 9/20 or 209/20
6/20
20 ^ -4 = 1/160000
2.65 in fraction form is 53/20