A survey was sent to 60 customers, 7 of whom responded. Then the survey was redesigned and sent to another 63 customers, 9 of whom responded. By approximately what percent did the response rate increase from the original survey to the redesigned survey? Choose the correct choice from the following answers
A) 2%
B) 5%
C) 14%
D) 28%
E) 4%
case 1: (7/60)=x/100   x=12%   case 2: (9/63)=y/100   y=14%   So percent increase is =(y-x)=(14-12)= 
<gadget id="calculator">(14-12)</gadget>
<output>2</output>
2%   2%nswer is 2%
<result>A</result>
A survey was sent to 60 customers, 7 of whom responded. Then the survey was redesigned and sent to another 63 customers, 9 of whom responded. By approximately what percent did the response rate increase from the original survey to the redesigned survey?