Breuken verm. (reeks 2)

Vermenigvuldig de breuken

\(\frac{8}{9} . \frac{9}{7}\)

\(\frac{8}{9} . \frac{9}{7}\\=+\frac{8.9}{9.7}\\=\frac{72}{63}\\=\frac{8}{7}\)