Question

What are rational numbers

Answer 1

A rational number is a number that can be written as a fraction or "ratio".
It includes the set of integers because all of them have a denominator of 1.  A rational number can take on the form of $\frac{a}{b}$ where b ≠ 0.  Terminating and repeating decimals are rational numbers because they too can be written as a ratio; for example, 0.3 = $\frac{3}{10}$ or 0.3333... = $\frac{1}{3}$.