пропорция
2400 100%
1320 х
х=100*1320 =55%
2400
, но хз
2400:100-(1320:100)=13,2
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пропорция
2400 100%
1320 х
х=100*1320 =55%
2400
, но хз
2400:100-(1320:100)=13,2