Breuken verm. (reeks 2)

Vermenigvuldig de breuken

\(\frac{-3}{-17} . \frac{4}{12}\)

\(\frac{-3}{-17} . \frac{4}{12}\\=+\frac{3}{17}.\frac{1}{3}\\=+\frac{3.1}{17.3}\\=\frac{3}{51}\\=\frac{1}{17}\)