The number \( \frac{4}{9} \) is a rational number. A rational number is defined as any number that can be expressed as the quotient of two integers, where the denominator is not zero. Since \( 4 \) and \( 9 \) are both integers and \( 9 \) is not zero, \( \frac{4}{9} \) is rational.
4/9 rational or irrational
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