The revenue from sales items in 1996 increases by x percent, compared in 1995 and the revenue in 1997 decreases by x percent, compared in 1996. If the revenue from sales items in 1997 decreases by 4 percent, compared in 1995, what is the value of x?
Select
A) 10
B) 15
C) 20
D) 30
E) 35
1995 - let the value be z   1996 - x% increase - z(1+x/100)   1997 - x% decrease - z(1+x/100)(1-x/100)   from 95 to 97 decrease is 4%   hence, [z-{z(1+x/100)(1-x/100)}]/z = 4/100   solving x = 20%   20 is the answer
<result>C</result>
The revenue from sales items in 1996 increases by x percent, compared in 1995 and the revenue in 1997 decreases by x percent, compared in 1996. If the revenue from sales items in 1997 decreases by 4 percent, compared in 1995, what is the value of x?