"Rational" is an adjective and so there cannot be "a rational" (and certainly not "an rational"). Any answer would depend on whether the question was about a rational number, a rational person, a rational argument or "a rational" combined with some other noun.
The sign of a rational number does not depend on whether it is odd or even.
The answer will depend on whether you want percentage equivalents of rational numbers or one rational number as a percentage of another.
It would depend on where you put the parentheses. 7/9 - 9 is a rational number 7/(9-9) is not even a number at all - surely not a rational number.
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Yes. Any rational number divided by any other rational number is a rational number.
Western auto is actually quite "cheap" compared to other car insurance dealers.This will always depend on the driver however, as better drivers get better, lower rates, while worse drivers get higher rates.
Any other rational number.
It is a normal rational number, just like any other rational number.
Every rational number is equivalent to infinitely many other rational numbers.
Any other rational number.
It will depend on your state law and why your license is suspended.