Most of written English flows left to right.
Roman numerals flow left to right in English.
The more commonly used Arabic numerals flow right to left in English as in Arabic and Hebrew.

I assume that formulae involving these are also the same in English, Arabic, and Hebrew.

Google now translates between English and Hebrew.

The expression "12/3" gets translated to "3/12".
Is this correct?

English to Hebrew:
http://translate.google.com/translate_t#en|iw|12%2F3

Hebrew to English:
http://translate.google.com/translate_t#iw|en|12%2F3

I am now getting different results.
It now translates "12/3" to "12/3".

I now tried translating "10-7" and it produces "7-10".
When I went back to that tab the translation had changed to "10-7".

I now have tried translating "1/2" and get "2/1".
It has not changed yet. Maybe someone else wants to try and report back.

It thinks it's translating dates from US to international format.

It's understandable that statistical analysis of existing translated documents would lead the translatebot to the conclusion that 9/11 (September 11) in a US English document corresponds to 11.9, 11-9 or 11/9 (11 September) in a European document.

I had not thought about interpreting the expressions as dates.
I still get the problem with the below expression that can not be confused with a date.

"98 / 49" sometimes translates to "49 / 98".