Respostas

2013-10-31T18:04:53-02:00
A) 40   100%
    10     x          multiplica em X

40x= 1000
x =  \frac{1000}{40}
x = 25%

B) 72  100
    3,6   x
72x= 360
x = \frac{360}{72}
x = 5

C) 150  100
     120   x

150x = 12000
x =  \frac{12000}{150}
x = 80%

D) 400  100
     136   x
400x = 13600
x =  \frac{13600}{400}
x = 34%
2 5 2