GO BACK TO MATH CLASS JP http://www.investopedia.com/ask/answers/03/100303.asp#axzz29hYqiDda going from .06 to .09 is a gain of 50% not 150%. based on the formula above .09-.06=.03 .03/.06 is 1/2 or 50% Doesn't take an engineering degree to figure it out.