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Yes, 2.45455 is a rational number because it can be expressed as a fraction. Specifically, it can be written as ( \frac{245455}{100000} ) after multiplying both the numerator and the denominator by 100000 to eliminate the decimal. Rational numbers are defined as numbers that can be expressed as the quotient of two integers, and 2.45455 meets this criterion.
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It is rational. It is rational. It is rational. It is rational.
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