[tex]cena\ garnituru\ przed\ obnizka:\ 100\%\\cena\ po \ 15\%\ obnizce:\\\\100\% -15\% = 85\%\\\\85\%\ \ -\ \ 1\ 275\ zl\\\\100\%\ \ -\ \ x\\\\x=\frac{\cancel{1275}^{15}*100}{\cancel{85}^1}= 1\ 500\ zl\\\\1\ 500-1\ 275=225\ zl\\\\odp.\ Cena\ garnituru\ po\ obnizce\ zmalala\ o\ 225\ zl.[/tex]
