There is no extra dollar. What you do is take 9+9+9=27, then subtract the $2 tip, not add it on. That gives the original $25 that was paid.

So each person paid $9 (once they got their $1 change back), and the waiter got $2, which is why you take off the $2, not add it back in.

But frankly that sounds like the sort of accounting that the governments of the world are going to be using to pay off the deficits they've run up..!

"Hey, look George, I can make money disappear! Our deficit will be gone by July!"



Thanks for sharing that one!