Yes. It should always be.
That is because a rational number is the quotient of two non zero integers.
For example: 2/3, 3/5, 9/2, 5/12, 1/3, 5/1, -4/5, 0/2, -4/3 are all rational numbers.
As long as you are not dividing by 0.
Note that any number that can't be expressed as a ratio of two integers is an irrational number.
Hope this explains it.