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In simplest form, what type of decimal expansion will ( \frac{44}{66} ) have?

Answer and explanation

Correct answer: Non-terminating recurring

A rational number has a terminating decimal expansion only when, after simplifying the fraction, the denominator has no prime factors other than 2 and 5. If the simplified denominator contains another prime factor, the decimal digits continue indefinitely and repeat in a pattern. Thus the fraction must always be simplified before deciding its decimal type.

Simplify \(44/66\) by dividing numerator and denominator by 22: \(44/66=2/3\). The denominator 3 is neither 2 nor 5, so the decimal cannot terminate. In fact, \(2/3=0.666\ldots\), where 6 repeats endlessly. Therefore the expansion is non-terminating recurring, which is option B. It is not non-terminating non-recurring because every rational number has either a terminating or a repeating decimal expansion.

Related tags

Number-SystemsDecimal-RepresentationSimplest-Form-Test

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