Question

14 supra 15 *(27 supra 10 * 20 supra 63 - 14 supra 15 : 18 supra 15

Answer 1

$\frac{14}{15}\cdot({ \frac{27}{10} \cdot \frac{20}{63} - \frac{14}{15}: \frac{18}{15})$

$\frac{14}{15}: \frac{18}{15}=\frac{14}{15}\cdot \frac{15}{18}= \frac{7}{9}$

$\frac{27}{10} \cdot \frac{20}{63}= \frac{6}{7}$

$\frac{14}{15} ( \frac{6}{7}- \frac{7}{9})=$

$\frac{14}{15}( \frac{54-49}{63})=\frac{2}{27}$



Answer 2

$\frac{14}{15} \times ( \frac{27}{10} \times \frac{20}{63} - \frac{14}{15} \div \frac{18}{15} )$

$= \frac{14}{15} \times ( \frac{3}{1} \times \frac{2}{7} - \frac{14}{15} \times \frac{15}{18} )$

$= \frac{14}{15} \times ( \frac{3 \times 2}{1 \times 7} - \frac{14}{18} )$

$= \frac{14}{15} \times ( \frac{6}{7} - \frac{7}{9} )$

$= \frac{14}{15} \times ( \frac{54}{63} - \frac{49}{63} )$

$= \frac{14}{15} \times \frac{54 - 49}{63}$

$= \frac{14}{15} \times \frac{5}{63}$

$= \frac{14 \times 5}{15 \times 63}$

$= \frac{70}{945}$

$= \frac{ 14}{189}$

$=\frac{2}{27}$