Um eine rechnung zu bezahlen überzieht egon sein girokonto für 24tage um1080 euro . seine bank berechnet einen zinssatz von 12.5%
$${\mathtt{Z}} = {\frac{{\mathtt{1\,080}}{\mathtt{\,\times\,}}{\mathtt{12.5}}{\mathtt{\,\times\,}}{\mathtt{24}}}{{\mathtt{36\,000}}}} \Rightarrow {\mathtt{Z}} = {\mathtt{9}}$$
$${\mathtt{Z}} = {\frac{{\mathtt{1\,080}}{\mathtt{\,\times\,}}{\mathtt{12.5}}{\mathtt{\,\times\,}}{\mathtt{24}}}{{\mathtt{36\,000}}}} = {\mathtt{9}}$$