Question

plz solve this plz plz plz plz plz​

Answer 1

Let x be the required fraction

${( \frac{5}{7} )}^{ - 2} \times x = {( \frac{15}{28} )}^{ - 1}$

${( \frac{7}{5} )}^{2} x = \frac{28}{15}$

$\frac{7 \times 7}{5 \times 5} x = \frac{28}{15}$

$x = \frac{28}{15} \times \frac{5 \times 5}{7 \times 7}$

$x = \frac{4}{3} \times \frac{5}{7}$

$x = \frac{20}{21}$

Answer 2

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