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Yes.

1.8 = 14/5 = 9/5 which is of the form a/b with a and b integers (whole numbers) so it is rational.

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Q: Is 1.8 is a Rational Number?
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Is -18 rational?

-18 is a rational number


What is 4 18 is it rational or irrational?

It is a rational number


Is 18 out of 2 rational?

Yes, any number that can be expressed as a fraction is rational. Since 18 out of 2 is the same as 18/2, it is rational.


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Yes - any whole number - even a negative number - is a rational number.


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Is 18 an rational number?

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