Yes. All natural numbers are rational.
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20 is both rational and natural. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
A natural number is an integer equal to 1 or greater. A rational number can be an integer or a fraction represented as x/y whereby x and y are both integers.
Rational: yes. Natural: no.
All natural numbers are rational numbers.
Every whole number is rational and an integer. But the "natural" numbers are definedas the counting numbers, so the negative whole numbers wouldn't qualify.No and yes: it is not a natural number but it is a rational number.