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1.Scumpire cu 10 % => 385
Pret initial?
2. 240 ha , arate 24 ha.
Procentul suprafetei nearate?



Răspuns :

1) 110%......385
     100...........x
x=385*100/110=38500/110=350 pret initial
 2)   240................100%
          24..................x
x=24*100/240=2400/240=10 % arate
100-10=90% suprafata  nearata