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The ratio of teachers to students at a school is 3:74. There are 2,500 students at the school. About how many teachers are at the school?
A) 35

B) 100

C) 300

D) 600

Answer :

AL2006
      
                                   Teachers / Students  =  3 / 74

                                      Teachers  /  2,500  =  3 / 74

To solve a proportion,
you cross-multiply:            Teachers x 74  =  2,500 x 3

Divide each side by  74 :     Teachers  =  2,500 x 3 / 74

                                                                  =  101.4     ===>  101 teachers                                     

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