Question

Is `3/4` a rational, irrational, natural, whole, integer or real number?

Answer 1

It's both real and rational.

Explanation:

The collections from wider to narrower:
(1) All numbers (including complex numbers, combinations with `i=sqrt(-1)`)
(2) Real numbers (excluding `i=sqrt(-1)`)
(3) Rational numbers can be written as the quotient, or fraction, or ratio, of two whole numbers, irrational numbers (like `pi` or `sqrt2`) cannot.
(4) Whole=integer numbers are what they say they are
(5) Natural numbers are positive whole numbers