RSM was founded in 1996. From 1996 to 1997, the number of students in RSM doubled. From 1997 to 1998 the number of students doubled again.By what percent did the number of students increase from 1997 to 1998?
I keep getting a wrong answer.
Let the initial number of students = N
Then in 1997 there were 2N
And in 1998 there were 2(2N) = 4N
% increase = [ Number in 1998 - Number in 1997 ] / [ Number in 1997 ] x 100%
So
[ 4N - 2N ] / [ 2N ] x 100% =
2N / 2N x 100% =
1 x 100% =
100% increase
