1. 77/210 => 77/210 = (7× 11)/ (30 × 7) = 11/30 => Factorising the denominator, we get, => 30 = 2 × 3 × 5 As you can see, the denominator is not in the form of 2^{m}× 5^{n} .Hence, 77/210 has a non-terminating decimal expansion.

    77/210
    => 77/210 = (7× 11)/ (30 × 7) = 11/30

    => Factorising the denominator, we get,

    => 30 = 2 × 3 × 5

    As you can see, the denominator is not in the form of 2^{m}× 5^{n} .Hence, 77/210 has a non-terminating decimal expansion.

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