Because "A quarter of an hour until X" actually *means* something. "This of That" in word problems indicates a ratio or division. Just what are we dividing?a
It's an American idiom. In fact, it is the DOMINANT American way of expressing minutes before an hour. Your "logic" makes you look stupid.
I didn't make this
up. <--------------- :shocked:
Since you live in this country, you need
to get along with the rest of us. <------- :shocked:
You'd have
a hell of a lot easier time of it here. <--------------- :shocked:
See where I'm
going with this? :laugh:
Time-telling
Fifteen minutes after the hour is called quarter past in British usage and a quarter after or, less commonly, a quarter past in American usage. Fifteen minutes before the hour is usually called quarter to in British usage and a quarter of, a quarter to or a quarter till in American usage; the form a quarter to is associated with parts of the Northern United States, while a quarter till is found chiefly in the Appalachian region. Thirty minutes after the hour is commonly called half past in both BrE and AmE. In informal British speech, the preposition is sometimes omitted, so that 5:30 may be referred to as half five. Half after used to be more common in the US.
Just because you've led a woefully sheltered life doesn't mean you get to impose your limited linguistic parochialism on others.