Question

Is 2 1/2 a whole and natural number?​

Answer 1

No, this is a mixed fraction, and thus it has value

$2\dfrac{1}{2}=2+\dfrac{1}{2}=\dfrac{3}{2}=1.5$

This number has decimal digits, so it's not a whole nor a natural number (they don't have decimal digits).

Answer 2

2 1/2 is not a whole and natural number. It is a rational number.