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A rational number can be expressed as a simple fraction, an irrational number cannot.
More formally:
A rational number is any real number that can be expressed as a ratio of two integers (positive or negative whole numbers).
(The denominator in the ratio cannot be zero.)
An irrational number cannot be expressed in that way.
The terms "rational" and "irrational" refer to the idea of "ratio".
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Earn +20 ptsQ: How do you define whether a given number is rational or irrational?
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Continue Learning about Math & Arithmetic
How can you determine whether the square root of a number is a rational number or an irrational number?
If it can't be expressed as a fraction then it is an irrational number
When an irrational number is divided by a rational number is the quotient rational or irrational?
Irrational.
What is the product of rational and irrational number?
The product of a rational and irrational number can be rational if the rational is 0. Otherwise it is always irrational.
When you multiply an irrational number by a rational number will the answer always be irrational rational or both?
It will be irrational.
Is the product of a rational number and irrational number always rational?
No.A rational times an irrational is never rational. It is always irrational.
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