SOLUTION: A uni math class begins the semester with 155 students enrolled. Of these, 95 were male and the rest were female. By the end of semester, 60% male and 40% of the females were st

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Question 1132203: A uni math class begins the semester with 155 students enrolled. Of these, 95 were male and the rest were female.
By the end of semester, 60% male and 40% of the females were still enrolled.
What percentage of the originally enrolled students has withdrawn from the class?
Answer by ikleyn(52778) About Me  (Show Source):
You can put this solution on YOUR website!
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The starting numbers are:

    155 students enrolled; of them, 95 are males and the rest  155-95 = 60 are female.



By the end of the semester, 

    0.6*95 = 57  male are still enrolled and  0.4*60 = 24 female are still enrolled.



The number of those who still attend the class is  57 + 24 = 81 person.


Hence, the percentage of the originally enrolled students withdrawn from the class is


    %28%28155-81%29%2F155%29%2A100 = 47.74.     ANSWER