Question

is -6.06 an irrational number

Answer 1

$No,\ is\ a\ rational\ number.\\\\-6.06=-6\frac{6}{100}=-6\frac{3}{50}\in\mathbb{Q}$

Answer 2

No it isn't an irrational number as it can be expressed as a fraction containing whole numbers.

-6.06

=(-600/100)-(6/100)

=-606/100

=-303/50