A rational number is defined as one that can be expressed as a ratio of two whole numbers, in other words, as a fraction. Again, by definition, an irrational number is one that CANNOT be expressed as a fraction.
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If it can be expressed as a fraction then it is rational if not then it is irrational
It is a rational number because it can be expressed as a fraction
No, because if need be it can be expressed as a fraction whereas irrational numbers can't be expressed as fractions.
No, because it can be expressed as a fraction.
It is a rational number because it can be expressed as a fraction.