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Are all fractions considered a rational number?
Yes - the word rational in this case means "can be written as a ratio".
Why 0 is rational number?
because it does not value Zero is considered rational because it can still be expressed as a fraction
Is 100 percent a rational number?
Yes, 100 percent is considered to be a rational number. The reason it is, is because it can be expressed as the quotient or fraction of two integers.
Why decimal is considered as rational number?
A decimal need not be a rational. A non-terminating, non recurring decimal is an irrational number. Only a terminating decimal or a recurring decimal is rational and that is because such a number can be expressed as a ratio of two integers.
If it doesn if a decimal doesn't terminate or repeat is it still a rational number or not?
No, if a decimal does not terminate or repeat, it is not a rational number. Rational numbers can be expressed as a ratio of two integers, and their decimal representation either terminates or repeats after a certain point. Decimals that do not have a pattern and continue indefinitely are considered irrational numbers.
