It is already in its simplest form.
Yes.
20 over 100 in its simplest form is 1 over 5
0.35
2/3
21/15 = 7/5 or 12/5
Eight over twenty one is in simplest form.
7/15 is in its simplest form.
The simplest form of 9 over twenty seven is 1/3
24/27 (It is already in its simplest form.)
Ten over twenty four as a fraction in simplest form = 5/12
one over five
It is already in its simplest form.
3/5
1/12
Yes.
8/25 is in its simplest form.