If it has whole numbers on top and bottom, or could be written that way,
then it's rational. Positive or negative makes no difference.
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It is a whole number and it can be written as a fraction, so it is rational.
9.5 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
The negative of a rational number is also rational.
It is a rational number because it can be expressed as a fraction
It is a rational number because it can be expressed as an improper fraction in the form of -80/1