Question

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Answer 1

Ответ:

$2 \frac{3}{5} \div ( \frac{5}{9} + 5.3) = \\ \frac{13}{5} \div ( \frac{5 \times 10}{9 \times 10} + 5 \frac{3 \times 9}{10 \times 9} ) = \\ \frac{13}{5} \div 5 \frac{77}{90} = \frac{13}{5} \times \frac{90}{527} = \frac{13 \times 18}{527} = \frac{234}{527}$