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What can you say about the prime factorisations of the denominators of the following rationals: 27.bar(142857)

What can you say about the prime factorisations of the denominators of the following rationals:

`27.bar(142857)`

Numerical

Since `27.bar(142857)` has non-terminating decimal expansion.

So, its denominator has factors other than 2 or 5.

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Chapter 1: Real Numbers - EXERCISE 1.6 [Page 1.42]

Chapter 1 Real Numbers
EXERCISE 1.6 | Q 4. (iii) | Page 1.42

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​What can you say about the prime factorisations of the denominators of the following rationals: 27.bar(142857)