An irrational number refers to one that can not be written as a ratio, or fraction, between two whole numbers.
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Because that is the definition of irrational numbers: They are the numbers that cannot be written as a ratio of two integers! A fraction is a ratio of two integers.
Any of the numbers which cannot be expressed as a ratio of two integers is irrational.
When either of the numbers cannot be divided by each other or they are both prime numbers.
No; it can be expressed as the fraction, or "ratio", of 3/4. Irrational numbers cannot be expressed as a fraction.No
They are both real numbers. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.