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-23 is a rational number
0.79 is a rational number but the square root of 23 is an irrational number
The number 8 out of 23 is a rational. This is used in math.
9 out of 7 is a rational number. A rational number is any number that can be expressed as a fraction where the numerator and denominator are integers, and the denominator is not zero. In this case, 9/7 can be simplified to 1.28571428571, which is a rational number.
Irrational