A Local Hospital Implemented a Program to Attempt to Reduce $\%$

A local hospital implemented a program to attempt to reduce the number of unnecessary visits to the emergency room. Prior to the implementation, there was an average of 568 visits and after the program began, there was an average of 470 visits per month. What percent decrease does this represent? Round to the nearest tenth.

A) 20.8 $\%$
B) 19.3 $\%$
C) 17.3 $\%$
D) 16.3 $\%$
E) 14.7 $\%$