Given the number:
You need to remember that, by definition:
1. A Rational Number is a number that can be written as a simple fraction, in which the numerator and the denominator are integers.
2. An Irrational Number is a number that cannot be written as a simple fraction.
In this case, you can identify that the number is written as the ratio of two integers. The numerator is 20 and the denominator is 6.
Hence, the answer is: It is a Rational Number.