0.4
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7.5
No, 8.5 is a rational number. A rational number is defined as any number that can be expressed as a fraction. 8.5 can be expressed as 8 1/2 or 17/2.
27.5 is a rational number because it can be expressed as a fraction in the form of 55/2
If that is repeating 6 then it is a rational number because it can be expressed as a fraction in the form of 2/3
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