If I want to say "one fourth of a region", then what do I say ?

{loS loch wa' Sep}

or

{Sep loS loch wa'}

I don't think it's either. loS loch wa' is a sentence. You can't treat it like a number.

I don't know how you'd use fractions to modify a noun. Maybe something like loS loch wa'; Sep SubmaHvam vIche' I rule one-quarter of the region, literally one is a fraction of four; I rule this fraction of the region.

-- 
SuStel
http://trimboli.name