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6000*x%=1200
x*=1200/600
x= 0,2%
7200 -x
x=7200*100/6000
x=720000/6000
x=120
120%-100%=20%
uwierz mi, bo jestem w b. dobrym lo na mat-fizie
7200 - x %
6000x - 720000 /:6000
x = 120
120% - 100% = 12%