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TUZIN-12 = 20% kopy , 80 % mendla
KOPA-60
MENDEL-15 = 25 % kopy, 125% tuzina
12/15*100%=80%
15/60*100=25%
15/12*100%=125%
12-x
x=1200/15=80%
60-100%
12-x
x=1200/60=20%
2.
60-100%
15-x
x=1500/60=25%
12-100%
15-x
x=1500/12=125%