Some are, some aren't.
If the portion after the decimal point:
then the decimal is rational.
then the decimal is irrational (not rational).
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It is a rational number because if need be it can be expressed as a fraction.
It is rational, like all terminating decimals.
Since it has a finite number of decimals, it is rational.
Repeating decimals are rational numbers if there is a pattern, like 0.22222222. If it is not a pattern, like 0.568964329, it is an irrational number.
If a number has a finite number of decimals, then it is RATIONAL.