0.21 would be rational,because it is a terminating decimal,which means that it has an ending point and can be converted into a fraction.ur welcome
0.21 is a rational number because it can be expressed as a fraction, specifically 100 21 . It is a terminating decimal, meaning it has a finite number of digits after the decimal point. Therefore, since it meets the definition of a rational number, we categorize 0.21 as rational.
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