This is probably a dumb question, but I was asked to get a measurement in percentage between 2 linear equations with different slopes. I have the following linear equations y1 = 450463x + 50000 y2 = 668453x + 100000 Can I determine a constant difference between them, in terms of A is X percent greater than B? if so, how do I calculate it? my guess is : 668453 - 450463 ----------------- = 32.6 % 668453 However when I test points it doesn't work, it varies, hmm maybe I'm looking for the wrong percentage? Any ideas?