TeX Quellcode:

{4\dfrac{2}{5} \, : \, 3\dfrac{1}{10} \, = \, \left(\dfrac{20}{5}\, +\, \dfrac{2}{5}\right) \, : \, \left(\dfrac{30}{10}\, +\, \dfrac{1}{10}\right) \, =\, \dfrac{22}{5} \, : \, \dfrac{31}{10} \, = \, \dfrac{22}{5} \, \cdot \, \dfrac{10}{31} \, = \, \dfrac{44}{31} = 1\dfrac {13}{31}}