[tex]\bf \cfrac{-3}{4}\cdot \cfrac{7}{-2}\div\cfrac{3}{-8}\implies \cfrac{-3}{4}\cdot \cfrac{7}{-2}\cdot \cfrac{-8}{3}\implies \cfrac{-3}{4}\cdot \cfrac{-8}{3}\cdot \cfrac{7}{-2} \\\\\\ \cfrac{-3}{3}\cdot \cfrac{-8}{4}\cdot \cfrac{7}{-2}\implies -1\cdot \cfrac{-2}{1}\cdot \cfrac{7}{-2}\implies \cfrac{2}{1}\cdot \cfrac{7}{-2}[/tex]
