I am trying to create a formula with the following numbers. Base of $180,000 in cell A1 and base of 75% in cell A2. If I change cell A1 to say any number over $180,000, then I want cell A2 to decrease by 1/10 of a percentage point for every $1,000 increase in cell A1. So if I change cell A1 to $196,342, then I want cell A2 to report 73.4% & so on? Any help would be much appreciated. Thanks!