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As a terminating decimal 3.66 = 366/100 (= 366/100) which is a fraction and so rational

If that is meant to be a recurring decimal, 3.66... = 36/9 = 11/3 which is a raction and so rational.

A decimal is irrational only if it is non-terminating (goes on forever) and do not repeat.

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Q: Is 3.66 irrational
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