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Which statement is correct about the decimal expansion of \(\frac{3}{28}\)?

Answer and explanation

Correct answer: It is a non-terminating recurring decimal

\(\frac{3}{28}\) is already in lowest terms, and \(28=2^2\times 7\). The decimal expansion of a rational number terminates only when the prime factors of its denominator are limited to \(2\) and \(5\). Since the denominator also contains the factor \(7\), the decimal expansion is non-terminating but recurring. The number is rational, so it is neither irrational nor an integer. Exam tip: After reducing a fraction, inspect its denominator; only factors \(2\) and \(5\) give a terminating decimal.

Related tags

Real NumbersDecimal ExpansionRational NumbersDecimal RepresentationNumber SystemsMathematicsClass 9 Mcq

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