Yes, 7.8 is a rational number. Expressed as a top-heavy fraction, it is equal to 39/5 or thirty-nine fifths.
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Is 12.05 a rational number or irrational number?
1.96 is a rational number
There is no such thing as a number that is both rational and irrational. By definition, every number is either rational or irrational.
Yes, it is.
It is a rational number, not an integer.