SOLUTION: on a math test, 12 students earned an A. This number is exactly 30% of the total number of students. How many students are in the class?

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Question 133466: on a math test, 12 students earned an A. This number is exactly 30% of the total number of students. How many students are in the class?
Found 2 solutions by vleith, josmiceli:
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
12 = 30% * classsize
+12+=+0.3+C
+40+=+C+

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
x= number of students in the class
.3x+=+12
x+=+40
There are 40 students in the class