oblicz liczbę,której 7% stanowi 15
7% - 15
100% - x
x= 100%*15/7%= 214,3
7%------15
100%-----x
x≈214,29
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7% - 15
100% - x
x= 100%*15/7%= 214,3
7%------15
100%-----x
x≈214,29