21/30 = 7/10
21/5 is the simplest form.
2/15
21/80 is already in its simplest form
21/100 is the simplest form.
62/21 is in its simplest form.
8/21 is the simplest form.
13/21 is in its simplest form.
21/4 is in its simplest form.
2/21 is in its simplest form.2/21 is in its simplest form.
21/50 is in its simplest form.
440/21 is in its simplest form.
21/22 already is in its simplest form.