A survey was sent to 75 customers, 7 of whom responded. Then the survey was redesigned and sent to another 60 customers, 9 of whom responded. By approximately what percent did the response rate increase from the original survey to the redesigned survey?
Select the correct option: A) 2% B) 5% C) 14% D) 60% E) 73%
Rate of first survey = 7/75   Rate of second survey = 9/60   % Response rate increase (9/60-7/75)/(7/75) = 60%   Answer is 60% = 60%
<result>D</result>
A survey was sent to 75 customers, 7 of whom responded. Then the survey was redesigned and sent to another 60 customers, 9 of whom responded. By approximately what percent did the response rate increase from the original survey to the redesigned survey?