A jar of crunchy peanut butter contains 1.35 kg of peanut butter. if you use 8.0 % of the peanut butter for a sandwich, how many ounces of peanut butter did you take out of the container?

1. You have that:
  
 -The jar of crunchy peanut butter contains 1.35 kilograms of peanut butter. 
 
 -You use 8.0 % of the peanut butter.
 

 2. You must convert 1.35 kilograms to ounces, as below:
 

 1 kilogram=35.2739 ounces
 
 =(1.35 kilogram)(35.2739 ounces/1 kilogram)
 =1.35x35.2739 ounces
 =47.61 ounces
 

  3. Then, you have:
 
 47.61 ounces-----100%
                     x-----8%
 
 8%/100=0.08
 100%/100=1
 
 x=(0.08x47.61 ounces)/1
 x=3.80 ounces
 
 How many ounces of peanut butter did you take out of the container? 
 
 The answer is: 3.80 ounces