Try asking for 3/4 of a pound of cold cuts sometime.
Always good for a few laughs.
You would think you asked them to explain Einsteins Theory of Relativity.
I used to try ordering 1/3 of a pound. One time the befuddled clerk sliced 3/4 of a pound.
I gave up. I ask about how many slices there are in a pound and then ask for the number of slices I want.