A survey was sent to 95 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 options
A) 2% B) 5% C) 7% D) 28% E) 63%
case 1: (7/95)=x/100   x=7%   case 2: (9/63)=y/100   y=14%   So percent increase is =(y-x)=(14-7)= 
<gadget id="calculator">(14-7)</gadget>
<output>7</output>
7%   Answer is 7%
<result>C</result>
A survey was sent to 95 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?