Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/prelude/Ratio/Fractional_Ratio.hs

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module Ratio where
--module Ratio(Fractional(..)) where

import DRatio
import RatioCon
import Num_Ratio

instance  (Integral a)	=> Fractional (Ratio a)  where
    (x:%y) / (x':%y')	=  (x*y') % (y*x')
    recip (x:%y)	=  y%x  --if x < 0 then negate y :% negate x else y:%x
    fromRational (x:%y) =  fromInteger x :% fromInteger y


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