Breuken aftrekken (reeks 2)

Trek de breuken af

\(\frac{15}{4}-\frac{18}{5}\)

\(\frac{15}{4}-\frac{18}{5}\\=\frac{75}{20}-\frac{72}{20}\\=\frac{75-72}{20}\\=\frac{3}{20}\)