Both rational and Irrational Numbers can be expressed with decimals. If the number is irrational, it will have an infinite number of decimal digits, and there will be no periodic repetition. For example, 1/7 (which is rational) is 0.142857 142857 142857... The same sequence of six digits repeats over and over again. In irrational numbers, this is not the case.
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Decimal numbers that can't be expressed as fractions are irrational numbers
No, irrational numbers can't be expressed as a terminating decimal.
Irrational numbers are numbers that cannot be expressed as a ratio of two integers or as a repeating or terminating decimal.
But irrational numbers are decimals that can't be expressed as fractions
Irrational numbers are decimal numbers that can't be expressed as fractions. An example is the square root of 2