8/9

8/9 can be read as any of the 3 you listed in addition to 8 divided by 9. When speaking, I would say eight ninths. It may be different depending on where you live.

I've never heard of "8 upon 9"... but the other two are correct.

Mame wrote: "I've never heard of "8 upon 9"... but the other two are correct."

Now I'm confused. 8/9 is not '8 upon 9'.

I never heard of 8 upon 9 either. Probably another British/American thing.

Hi TTH

Could you please let me know where '8 upon 9' is BrE?

Australian is close to british English.

8 upon 9 is not something I am familiar with.

8 over 9
eight nineths
8/9 could also be read as "eight or nine".
"there were eight or nine of them"

Hi Yoong Liat

"Could you please let me know where '8 upon 9' is"
in my head (over and upon are 2 words that I always thought could mean the same thing depending on how they are used)

This is the best I could find in writing.
http://dictionary.reference.com/browse/over