Question

On a math test, 12 students earned an A. This number is exactly 25% of the totalnumber of students in the class. How many students are in the class?

A. 15B. 16C. 21D. 30E. 48

Answer 1

Answer: E. 48

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Work Shown:

x = number of students in the class

25% of x = (25/100)*x = 0.25x = number of students who got an A

0.25x = 12

x = 12/0.25 ...... divide both sides by 0.25

x = 48

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Alternative Method

part/whole = percent/100

12/x = 25/100

12*100 = 25*x ..... cross multiply

1200 = 25x

25x = 1200

x = 1200/25 .... divide both sides by 25

x = 48

Answer 2

the answer is 15

Explanation:

i hope it helps :)