Yes, 0.2 is a rational number. By definition, a rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.
In the case of 0.2, it can be written as the fraction 2/10. Both 2 and 10 are integers, and 10 (the denominator) is not zero. Furthermore, this fraction can be simplified to 1/5, which also confirms that 0.2 is indeed a rational number.
Rational numbers include integers, fractions, and finite or repeating decimals. Since 0.2 has a finite decimal representation, it categorizes it firmly within the set of rational numbers.