Is 1.325 irrational

NO!!! Because 1.325 is a terminating decimal.

Casually, Irrational Numbers have the decimals digits to infinity, and there is no regular order in the digital sequence.

More correctly , an irrational number CANNOT be converted into a Rational Number /Quotient/ Fraction.

NB pi = 3.141592.... is probably the most well known irrational number.