Answer
$\frac{2}{3}$
Work Step by Step
$\frac{3}{5} \div \frac{9}{10} = \frac{3}{5} \times \frac{10}{9} = \frac{3 * 10}{5 * 9} = \frac{2 * 3 * 5}{3 * 3 * 5} = \frac{2}{3} \times \frac{3 * 5}{3 * 5} = \frac{2}{3}$
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