Yes, 66.5 is a rational number. A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero. In the case of 66.5, it can be expressed as \( \frac{665}{10} \), which is the fraction of two integers (665 and 10). Therefore, it is a rational number.
is 66.5 a rational number?
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