In 2005, 25 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?
Choose the correct choice:
A) 15%
B) 50%
C) 62.5%
D) 115%
E) 160%
in 2005 25% of 40= 10 students were female   in 2007 40% of 65 = 26 were female   % increase= (26-10)/10 *100= 
<gadget id="calculator">(26-10)/10 *100</gadget>
<output>160</output>
160%   160% is the answer
<result>E</result>
In 2005, 25 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?