9,00 euro minus 18 prozent
9 Euro sind 100% 100% - 18% = 82%
x Euro sind 82 %
$$x = \frac{9*82}{100}$$
$$x = \frac{738}{100}$$
$$x = 7,38$$
9 Euro minus 18% sind 7,38 Euro.
$${\mathtt{9}}{\mathtt{\,-\,}}{\mathtt{18}}\% = {\frac{{\mathtt{369}}}{{\mathtt{50}}}} = {\mathtt{7.38}}$$