Question

como resolver esta expressão:
(2/3-1/8.4/7):2/7.4/9

Answer 1

$\frac{(\frac{2}{3}-\frac{1}{8}\cdot \frac{2}{7})}{\frac{2}{7}\cdot\frac{4}{9}} \\\\\\\frac{(\frac{2}{3}-\frac{2}{56})}{\frac{8}{63}}\\\\\\(\frac{2}{3}-\frac{2}{56}) \cdot \frac{63}{8}\\\\(\frac{2\cdot56}{3\cdot56}-\frac{2\cdot3}{56\cdot3}) \cdot \frac{63}{8}\\\\(\frac{112}{168} - \frac{6}{168}) \cdot \frac{63}{8}\\\\\frac{112-6}{168} \cdot\frac{63}{8}\\\\\frac{106}{168}\cdot\frac{63}{8}\\\\\frac{6678}{1344} = \frac{3339}{672} = \frac{1113}{224}$