-45 is this an irrational number root integer whole number ratio decimal irrational decimal imaginary number a rational number ratio

clearly, it is an integer

- 45 is integer and also a rational.

A rational number is a number that can be represented as:

a / b

where a and b are integers and b is not equal to 0.

- 45 = - 45 / 1

So - 45 is a rational.