I tried to change pounds to dollars in Florida in the 1990s. The lady read the conversion details backwards (it was probably 1.25 dollars to the pound at the time) and gave me the opposite ratio (works out at 0.80).
When I pointed out the error, she said “The US dollar is the strongest currency in the world, sir! It’s always point-something” and refused to believe me.
This was at a bank. The manager had to be called. Neither of them were happy to discover the truth and both resented having to eventually give me the correct exchange!
Legend?