was ist 399 euro minus 12 prozent

1.)    $${\mathtt{399}}{\mathtt{\,-\,}}{\mathtt{12}}\% = {\frac{{\mathtt{8\,778}}}{{\mathtt{25}}}} = {\mathtt{351.12}}$$

2.)     100% - 12% = 88% = 0,88      =>    $${\mathtt{399}}{\mathtt{\,\times\,}}{\mathtt{0.88}} = {\frac{{\mathtt{8\,778}}}{{\mathtt{25}}}} = {\mathtt{351.12}}$$

3.)        12%   von 399 € = 399*12/100 €  =  $${\frac{{\mathtt{399}}{\mathtt{\,\times\,}}{\mathtt{12}}}{{\mathtt{100}}}} = {\frac{{\mathtt{1\,197}}}{{\mathtt{25}}}} = {\mathtt{47.88}}$$ €

            399 € - 47,88 €     =>   $${\mathtt{399}}{\mathtt{\,-\,}}{\mathtt{47.88}} = {\frac{{\mathtt{8\,778}}}{{\mathtt{25}}}} = {\mathtt{351.12}}$$ €

Antwort:    399 € - 12% = 351,12 €

Gruß radix !

100-12%=88%=0,88

399*0,88=351,12

Eigentlich eben genau der Term

 $$399\text{ EUR} - 12\%$$

einfacher geht es nicht zu schreiben!