SOLUTION: In 2007 there are 350 libraries in southern Illinois, this is a 75% increase over 2000, how many were there in 2000? (I know the answer is 200 but I don't know how to show how i g

Question 86953: In 2007 there are 350 libraries in southern Illinois, this is a 75% increase over 2000, how many were there in 2000? (I know the answer is 200 but I don't know how to show how i got that answer)
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
a 75% increase means that 75% of the original value was added to it

let x equal the 2000 amount ... so x+.75x=350 ... 1.75x=350 ... x=200