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0.777.... = 7/9 which is the ratio of two integers, therefore 0.777... is a rational number.

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Q: Is the number 0.7777... repeating forever rational or irrational?
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Is the number pi that goes on forever with no repeating pattern rational or irrational?

pi is an irrational number. It can not be expressed as a ratio of two integers.


Is 21 a rational number?

Yes. Any whole number is rational. An irrational number is one that goes on forever without repeating, like √2=1.414213...


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A repeating rational number is an irrational number. An irrational number is an number that has no definite end. 4.15 has a definite end and is therefore a rational number.


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It is a rational number because it can be expressed as a fraction.


Is 3.40764076407640764076 rational or irrational?

3.407640764076407640764076(not repeating) is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction. ---- 3.407640764076407640764076 = 3407640764076407640764076/1000000000000000000000000 Which is of the form of one_integer/another_integer so it a rational number. 3.4076... (where the 4076 repeats forever): 3.4076... = 34076/9999 = 34073/9999 Again of the form of one_integer/another_integer so it a rational number. Either way, 3.4076...4076 is a rational number. Decimal numbers that terminate, or go on forever with repeating a sequence of digits are rational. Decimal numbers that go on forever without repeating a sequence of digits are irrational, eg √2.


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Is every rational number a repeating decimal?

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How do you know if a decimal is rational or irrational?

A decimal is rational if it:either ends and doesn't go on forever; ORit is a repeating decimal.A decimal is irrational if it goes on forever and ever and never stops without repeating.The number: 5.77777777 is rational because it goes on forever, REPEATING the same number (the digit 7).It can also repeat a group of numbers, like the number: 8.789789789789789789See how the "789" is REPEATING over and over again and never stops? That is a rational decimal!