Respuesta :

AndyBryer
If 60% of the painters is 12, then 10% of the painters is 2, and therefore there are 20 painters.
Kmieteczka
12 painters ----- 60% of the painting crew
x painters ------- 100% of the painting crew
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12*100%=x*60%
12*1=x*0,6
12=0,6x
x=20

20 painters worked on this job :)