Question

a) 10% de 640
b)20% de 600
c)30% de 350
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Answer 1

Resposta:

a) 100% vale 640

      10% vale x

x=640 x 10 : 100

x=64

b)100% vale 600

      20% vale x

x=600 x 20 : 100

x=120

c)100% vale 350

      30% vale x

x= 350 x 30 : 100

x=105