Question

qual eo valor de70% de 3000

Answer 1

Regra de 3. Fica assim:

3000  = 100%
  X          70

100.X=3000.70
100x=210000
X=210000/100
X=2100

Answer 2

70% de 3000

3000   100%
    x       70%

100x=3000 . 70
100x= 210000
       x= $\frac{210000}{100}$
       x= 2100