2.45 is rational. Rational numbers are numbers that can be written as a fraction. Irrational Numbers cannot be expressed as a fraction.
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Well, honey, if you're asking if 0.245245245... is a rational number, the answer is yes. Any repeating decimal can be expressed as a fraction, so this one can be written as 245/999. So, technically speaking, it's rational, but who's really keeping track?
245/100 245%
2450/10 = 245 of them.2450/10 = 245 of them.2450/10 = 245 of them.2450/10 = 245 of them.
245 245
2/245