As posted, no, 0.7142857 is not an "irrational number". It might be fairly complicated to reduce, but it can be expressed rationally - that is, as the ratio or fraction between two other numbers..
Irrational Numbers are numbers that cannot be expressed as a fraction. For example, the number "pi", which is the ratio of the circumference of a circle to its diameter, cannot be expressed as a fraction of any other numbers.
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An irrational number.
When added to a rational number, any irrational number will produce an irrational number.also, when added to an irrational number, any rational number will produce an irrational number.
It is not an irrational number!
Yes, it will always be irrational.
It is not always irrational.