cena towaru z 200 zl wzrosla do 230zl. O ile procent wzrosla cena?
230*100)/200=115%
115-100=15%
200zł - 100%
230zł - x
x=230zł*100%:200zł=115%
115%-100%=15% <-o tyle wzrosła cena
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230*100)/200=115%
115-100=15%
200zł - 100%
230zł - x
x=230zł*100%:200zł=115%
115%-100%=15% <-o tyle wzrosła cena