Respuestas

2013-02-16T19:37:57+01:00

(3000*30)=9000/100=900

 

 

o mas facil: 3000*0.30=900

2013-02-16T19:38:10+01:00

30% de 3000 = (3000:100) x 30 = 30 x 30 = 900