Rise over run is used to determine slope. It doesn't matter which number is bigger. It simply tells you how far up a slope climbs over what distance. So on a roof for instance, 4/12 means the roof climbs 4 inches higher every foot of width.
Either can be bigger: it is no big deal.
Yes, people trip if it is not. Remarkably almost all cultures use the same ratio.
The run is always longer, if not, I bet your staircase does not meet code
rise divided by run: a fraction, rise is y and run is x (you run on a horizontal plane) (you rise on a vertical plane)
Your run should always be longer than the rise. Current International Residential Code states the rise cannot be greater than 7-3/4" and the run cannot be less than 10". A common stair stringer has a 7" rise with a 11" run. rip your stair tread to 12" , this will over hang the run on the stringer by 1", when you install your toe kicks, use 3/4" material and you will wind up with a 1/4" overhang on each tread. Of course there are different ways to do this, but I believe this is most common.
If you're talking about slope, it is rise over run. But why is it not the other way run over rise?
No, elephants are much, much bigger. A single enraged elephant can squash an adult lion like they are breaking watermelons; without barely lifting a toe. If an elephant is around, lions always run the other way!
No, they run from them because their enemies are bigger and stronger than they are.
Yes, rise divided by run
Run in x64 mode.
Rise over run
Rise/run is the slope of a line.