Respostas

2013-04-05T03:01:07-03:00

a) \frac{4}{5} = \frac{x}{100}\\\\ 400=5x\\\\ x=80\% 

 

 

 


b) \frac{1}{4} = \frac{x}{100}\\\\ 100=4x\\\\ x = 25\%

 

 

 


c) \frac{3}{25} = \frac{x}{100}\\\\ 300=25x\\\\ x = 12\%

 

 

 


d) \frac{1}{40} = \frac{x}{100}\\\\ 100=40x\\\\ x = 2,5\%

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