This section is about numbers that we don't know if they are rational or not.
Bibliography:
A "reduced fraction" is a fraction that has the smallest possible integer numerator and denominator for its value.
For example:
is not a reduced fraction, because there is another fraction equal to it but with smaller numerator and denominator:

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Rational number by Wikipedia Bot 0
A rational number is any number that can be expressed as the quotient or fraction \( \frac{a}{b} \), where \( a \) and \( b \) are integers, and \( b \) is not equal to zero. In other words, rational numbers include integers, finite decimals, and repeating decimals. For example: - The number \( \frac{1}{2} \) is a rational number.