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What type of decimal expansion does \(\frac{37}{54}\) have?

Answer and explanation

Correct answer: Non-terminating repeating

\(\frac{37}{54}\) is already in lowest terms because the greatest common divisor of 37 and 54 is 1. The denominator is \(54=2\times3^3\), so it contains the factor 3 along with 2. A reduced fraction has a terminating decimal only when its denominator contains no prime factors other than 2 and 5. Therefore, \(\frac{37}{54}=0.685185185\ldots\) is non-terminating and repeating. Thus, the ‘Terminating’ option is incorrect. Exam tip: If a reduced denominator has any prime factor other than 2 or 5, the decimal expansion is non-terminating repeating.

Related tags

Real NumbersDecimal ExpansionRational NumbersNumber SystemsMathematicsClass 9 Mcq

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