0
Yes.
Rational numbers have a terminating decimal digit or a non-terminating recurring decimal digit.
Rational numbers are generally expressed in the form (p/q) where 'q' does not equal 0. 21.09 can be written as (2109/100) which is of the (p/q) form and 'q' is not equal to zero.
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Earn +20 ptsQ: Is 21.09 a rational number
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Continue Learning about Math & Arithmetic
Is a rational number always a rational number?
As much as, in these days of uncertainty, anything can be anything. As long as the constraints of a rational number are kept to, a rational number will always remain a rational number.
Is the sum of a rational number and a rational number rational?
Yes.
Can you multiply an irrational number and a rational number to get a rational number?
Yes, but only if the rational number is 0.
Can a rational number be multiplied by an irrational number and equal a rational number?
Only if the rational number is 0.
How is a rational number that is not an integer different from a rational number that is an number?
A rational number which is an integer can be simplified to a form in which the denominator is 1. That is not possible for a rational number which is not an integer.
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