3/5
No, it is not.
No, that's 3/5
5/4
It is 11 and 2/5 as a mixed number in its simplest form
5 over 9 is the simplest form.
4 over 5 is in simplest form.
3 over 5 reduced to the simplest form is 3/5
5 over 12 is in simplest form.
4 over 5 is in simplest form.
4/5 is in its simplest form.
That is its simplest form.