2/15 is the simplest form.
2/15 is in its simplest form.
4/5
9/15 = 3/5
2/5
That's it. It can't be reduced any further.
2/3 is in its simplest form.
That is its simplest form.
2/7 (it is already in simplest form)2/7 is in its simplest form.
-2/3 is in its simplest form.
2/21 is in its simplest form.
1/2 is in its simplest form.
2/7 is the simplest form.