\(\sqrt{400} =20\)
Since 20 is a whole number it is rational.
But what is we had the number 1.5
1.5 can be expressed as \(\frac{3}{2}\) that is 1.5 as a ratio.
Now what is we had pi (3.14159...)\(\frac{?}{?}\) Pi is irrational because there is no ratio for it.
A Rational Number can be written as a Ratio of two integers (ie a simple fraction).
