Hallo Anonymous,
alter Preis AP => 100 % 200 € => 100%
- Abnahme A => x % - 50 € => 100*50/200 = 25%
neuer Preis NP => y % 150 € => 75% => f = 0,75
y= NP*100/AP f = NP/AP f = 0,75
NP = AP*f AP = NP/f
$${\mathtt{NP}} = {\mathtt{AP}}{\mathtt{\,\times\,}}{\mathtt{f}}$$ $${\mathtt{AP}} = {\frac{{\mathtt{NP}}}{{\mathtt{f}}}}$$ $${\mathtt{A}} = {\mathtt{AP}}{\mathtt{\,-\,}}{\mathtt{NP}}$$
$${\mathtt{NP}} = {\mathtt{200}}{euro}{\mathtt{\,\times\,}}{\mathtt{0.75}} = {\mathtt{150}}{euro}$$
$${\mathtt{AP}} = {\frac{{\mathtt{150}}{euro}}{{\mathtt{0.75}}}} = {\mathtt{200}}{euro}$$
$${\mathtt{A}} = {\mathtt{200}}{euro}{\mathtt{\,-\,}}{\mathtt{150}}{euro} = {\mathtt{50}}{euro}$$
Wenn du dein Zahlenbeispiel senden würdest, könnten wir das noch einmal durchrechnen.
Gruß radix
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+14538 
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