5/2011 is in its simplest form.
The simplest form of 5 and 5 is 10:
21/5 is the simplest form.
4/5 is in its simplest form.
That is its simplest form.
5/6 is the simplest form.
5/33 is in its simplest form.
5/12 = is the simplest form.
5/12 is the simplest form.
43/5 is in its simplest form.
4/5 is in its simplest form.
5/6 is in its simplest form.
5/18 is in its simplest form.