[Jensson]

But they wouldn't ask for a third of a meter if they were using metric, just like you wouldn't ask for a firth of a yard if you were using imperial.

[mulmen]

The US customary system conventionally uses reciprocal powers of two. 1/3 is unlikely to be a specified distance. I rarely hear anyone speak in yards. If someone wanted “a third of a yard” they’d just say one foot. A third of a foot is just four inches. Or slightly less for clearance would be three and 7/8 inches, etc.

[friend_and_foe]

Yes they would, if they wanted something divided by 3.