Hello :)

Rational

Our task is to determine if 11.4772 is irrational or not.
Rational numbers are all numbers that can be written as a fraction.
Such numbers are 1/5, 12/17, -3/4, 0.5, -12.67, 0.333, etc.
Irrational numbers, on the other hand, are all numbers that cannot be written as fractions. Some examples would be pi, Euler's constant, the square root of 5, etc.
The number 11.4772 can be written as a fraction, which makes it rational.