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Concept

Rational Numbers

The set of rational numbers, represented by the symbol is formed by all numbers that can be expressed as the ratio between two integers, where
All four of these examples are rational numbers. Note that integers are also rational because they can always be written as fractions with a denominator of
In other words, integer numbers is a subset of rational numbers.
Integer numbers as a subset of rational numbers

Real numbers that are not rational are called irrational numbers.