Answer
15
Work Step by Step
$\frac{3}{4} \div \frac{1}{20} = \frac{3}{4} \times \frac{20}{1} = \frac{3 * 20}{4} = \frac{2 * 2 * 3 * 5}{2 * 2} = \frac{3 * 5}{1} \times \frac{2 * 2}{2 * 2} = 3 \times 5 = 15$
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