in a math class, there are 18 girls and 12 boys. what percent of the class are boys?
options
a.45%
b.55%
c.60%
d.40%

D.) 40%. Because if you add 18 and 12 you get 30, which is your overall total. Then you take the 12 boys and the total people and divide:

30)12 
30)12.0
          .4
30) 12.0
      -120
        000

 Then you turn that into a Percent and get 40%
  
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Cbecause they are equal so that means it is the same on both sides? ! hope this