In Country C, the unemployment rate among construction workers dropped from 16 percent on September 1, 1992, to 9 percent on September 1, 1996. If the number of construction workers was 20 percent greater on September 1, 1996, than on September 1, 1992, what was the approximate percent change in the number of unemployed construction workers over this period?	Choose the correct choice from the following options.
A) 50% decrease B) 30% decrease C) 15% decrease D) 30% increase E) 55% increase
September 1, 1992   The total number of construction workers = 1,000 (assume);   16% are unemployed, thus the number of unemployed workers = 160.   September 1, 1996   The total number of construction workers = 1,200 (20% greater);   9% are unemployed, thus the number of unemployed workers = 108.   Decrease is 52, which is approximately 30% of 160.   Answer: 30% decrease.
<result>B</result>
In Country C, the unemployment rate among construction workers dropped from 16 percent on September 1, 1992, to 9 percent on September 1, 1996. If the number of construction workers was 20 percent greater on September 1, 1996, than on September 1, 1992, what was the approximate percent change in the number of unemployed construction workers over this period?