A working knowledge of statistics is very helpful when you want to understand the statistics reported in

Question:

A working knowledge of statistics is very helpful when you want to understand the statistics reported in the news. The news media and our government often make a statement such as, “Crime rate jumped 50% in your city.”
a. Does an increase in rate from 4 to 6 represent an increase of 50%? Explain.
b. Why would anybody report an increase from 4 to 6 as a “50% rate jump”?