Respostas

2014-01-30T22:10:02-02:00
300g ------- 100%
  x ------------- 22%

300 x 22 =100x

x=6600/100
x=66g
1 5 1
2014-01-30T22:12:01-02:00
Regra de três simples : 

300 g ------------- 100 % 
      x ------------- 22 %

100 x = 300 . 22
100 x = 6600
x = 6600 / 100
x = 66 gramas
4 5 4