Breuken verm. (reeks 3)

Vermenigvuldig de breuken

\(\frac{-2}{5} . \frac{3}{12}.\left(\frac{-3}{4}\right)\)

\(\frac{-2}{5} . \frac{3}{12}.\left(\frac{-3}{4}\right)\\=+\frac{2}{5}.\frac{1}{4}.\frac{3}{4}\\=+\frac{2.1.3}{5.4.4}\\=\frac{6}{80}\\=\frac{3}{40}\)