Question: In 2005, 30 percent of the math department’s 40 students were female, and in 2007, 40 percent of the math department’s 65 students were female. What was the percent increase from 2005 to 2007 in the number of female students in the department?\nOptions:\n(A) 15%\n(B) 116%\n(C) 136%\n(D) 155%\n(E) 160% Random thoughts:
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Female students in 2005 = 30% of 40 = 12\nFemale students in 2007 = 40% of 65 = 26\nPercentage increase = [(26 - 12)/12] *100 % = 116% The final answer: (B).
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