Conversion factors is one name given to this device. 100oC = 212oF would be a specific example.
+++ That does not give a ratio, because you can not give a ratio between different units unless one unit is a linear multiple of the other. The example above will not work because the link between ºC and ºF is not linear, and the conversion cannot give a ratio.
+++++
A better example would be 9°R/5K where °R is degrees Rankine and K is Kelvin
12 inches/foot
1760 yards/mile
1000 m/km
what is it
Its an inequality
it's a rate bro
To compare to different units of measurement or a ratio that compares two quantities of different units (Ex: A car goes 100 miles in 1.5 hours, what is the rate)
The ratio between two different quantities is the rate.Usually, the second unit is a measure of time.
ratio that compares 2 quantities measured in diiferent units
what is it
Its an inequality
it's a rate bro
A conversion factor.
rate
A rate.
It is a ratio
Conversion factor.
A rate.
That is known as a unit rate.
There are many instances: for example, speed is measured in kilometres per hour where the ratio is measured between a distance (measured in kilometres) and time (measured in hours). So it is no big deal except that you need to mention the units.