Hello everyone!
Here's a weird one for you guys. I'm working on a spreadsheet where one formula is killing me and it it's probably the first thing you learn to do with Excel. For some reason it's not working.

Cell A1 = 1, Cell B1 = 1.0001, Cell C1 = A1-B1

I've been trying to figure this out for days now and am starting to question my sanity. Excel gives me -0.000099999999999989 as my answer. Any idea why it rounds this out to that? Isn't the answer supposed to be -.0009999....(all 9's)? Where does that 8 come from?