What are irrational and rational numbers

Rational numbers are numbers that can be written a/b were b is not zero, basically numbers that can be written in fration form irrational numbers are numbesr that cannot be written in fraction form because of certain reasons such as never ending like the number π (pi) which never ends, 3.14 is only an aproximation baseically rational=can be written as fraction irrational=cannot be written as a fraction, could be enless