A = ($\frac{-5}{24}$ + 0,75 + $\frac{7}{12}$) : (-2$\frac{1}{8}$)
A = ($\frac{-5}{24}$ + $\frac{3}{4}$ + $\frac{7}{12}$) : ($\frac{-17}{8}$)
A = ($\frac{-5}{24}$ + $\frac{18}{24}$ + $\frac{14}{24}$) . ($\frac{-8}{17}$)
A = $\frac{9}{8}$ . ($\frac{-8}{17}$)
A = $\frac{-9}{17}$
B = $\frac{-3}{5}$ . $\frac{2}{7}$ + $\frac{-3}{5}$ . $\frac{5}{7}$ + 2$\frac{3}{5}$
B = $\frac{-3}{5}$ . ($\frac{2}{7}$ + $\frac{5}{7}$) + $\frac{13}{5}$
B = $\frac{-3}{5}$ . 1 + $\frac{13}{5}$
B = $\frac{-3}{5}$ + $\frac{13}{5}$
B = $\frac{10}{5}$ = 2