It is both.
45 is real, rational, whole, natural, odd, composite, and an integer.
45 is a rational number
45 is a Natural number, a Rational number and a Complex number, amongst other things. It is only a quarter when the whole is [specified to be] 180.
Every whole number is rational.
It can be written as a fraction, so it is rational. It is not an integer, whole number or irrational.
Yes. In fact, every whole number is a rational number.
It is rational and also a whole number.
Every whole number is rational.
-18.75 is not a whole number but it is a rational number
No because all whole numbers are rational
No. Every rational number is not a whole number but every whole number is a rational number. Rational numbers include integers, natural or counting numbers, repeating and terminating decimals and fractions, and whole numbers.
Yes, all whole numbers (integers) are rational. Please note though that not all rational numbers are integers.