Q: Is 18.78 repeating rational

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Repeating decimals are always rational.

They can. And if you include repeating 0s and repeating 9s, then all rational numbers can be written with infinitely long repeating digits.

Yes, a rational number can be a repeating decimal. A repeating decimal is a decimal in which one or more digits repeat infinitely. For example, 1/3 is a rational number that can be written as the repeating decimal 0.333...

Any time your decimal is not repeating, it is rational.

Any rational number is either a repeating decimal, or a terminating decimal.

Related questions

A repeating decimal is rational.

All repeating decimals are rational numbers. Not all rational numbers are repeating decimals.

This is rational because itś a repeating decimal

If you convert repeating decimals into a fraction, you see that the repeating decimals are rational.

yes rational means repeating. same thing.

Repeating decimals are always rational.

rational

Is 0.88 repeating a rational number

Any terminating decimal is rational. So are repeating (periodic) decimals.Any terminating decimal is rational. So are repeating (periodic) decimals.Any terminating decimal is rational. So are repeating (periodic) decimals.Any terminating decimal is rational. So are repeating (periodic) decimals.

They can. And if you include repeating 0s and repeating 9s, then all rational numbers can be written with infinitely long repeating digits.

1.121212121212...is rational. It is a repeating decimal and it is rational.

It is a rational number.