There are 25 students in the first monthly math test of grade 9 in Handian Middle School, and the third monthly math test 100. If the growth rate is the same every time, what is the growth rate?
Solution: If each growth rate is x(x is a percentage), the number of people who pass the second monthly exam is 25( 1+x), and the number of people who pass the third monthly exam is 25( 1+x)X( 1+x).
25( 1+X)X( 1+X)= 100
(1+x)=2 or -2.
X>0, so x= 1= 100%.
A: The growth rate of the number of people who pass the monthly examination is 100%.