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1250/1350 = 100 / 10 = 10%
1/7 = ok. 15 %
5/100 z 230 = 1/20 × 230 = 11,50 zł
100-92.6=7.4% w przyblizeniu
2. 1/7 x100%=14.3% w przbylizeniu
3.5%-230zł
100%-x
x=100*230zł:5
x=4600zł