8÷25=32%
The percentage of planting area of American ginseng increased over the previous year was as follows
1600÷7000=23%
The proportion of freshwater fish culture water surface has increased respectively over the previous year.
150÷4 14=36%
(2) Assume that the average annual growth percentage of American ginseng planting area in 2003 and 2004 is X.
( 1600+7000)*( 1+x)*( 1+x)= 12384
x=20%
A: In 2003 and 2004, the average annual growth rate of American ginseng planting area was 20%.