30 von 65000 ist wie viel Prozent?
http://web2.0rechner.de/fragen/wie-gehen-die-prozentformeln
$${\mathtt{p}} = {\frac{{\mathtt{30}}{\mathtt{\,\times\,}}{\mathtt{100}}}{{\mathtt{65\,000}}}} \Rightarrow {\mathtt{p}} = {\mathtt{0.046\: \!153\: \!846\: \!153\: \!846\: \!2}}$$