Quote Originally Posted by hddscan View Post
I'm not sure but I'd guess that if BP is written as 120/70, then somebody might guess that / sign also means division, so when it's written as 120/70 somebody might see it and say, hey it looks like 120 divided by 70 or in Russian 120 делённое на 70 or simply 120 на 70.
It's my guess it could be very much untrue.
"Blood pressure is usually expressed in terms of the systolic (maximum) pressure over diastolic (minimum) pressure and is measured in millimeters of mercury (mm Hg)."(Wikipedia)

It is not division, but two things put together with a stroke "/". In English, the fraction 3/4 can be said "three over four", etc. So blood pressure looks like a fraction, it is spoken "120 over 70".

I guess Russians speaks of numbers with stroke "/" (though not necessarily fractions) using на + acc.?