21/3 is rational. Rational numbers are numbers that can be written as a fraction. Irrational Numbers cannot be expressed as a fraction.
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It is equal to 21/2 which is a rational number
0.21 is a rational number because it can be expressed as a fraction in the form of 21/100
Well, isn't that a happy little question! 0.21 is a rational number because it can be expressed as a fraction, specifically 21/100. Just like painting a beautiful landscape, math can be a lovely and calming experience once you understand its gentle rhythms.
Yes, any integer over any other integer (except zero) is always a rational number.
the square root of 21