There need not be any such fraction: consider temperatures in the Celsius and Fahrenheit scales.
a ratio.... of course!!
A fraction that compares 2 equivalent measurements is often referred to as a conversion factor. It represents the relationship between two different units of measurement for the same quantity. For example, the fraction 1 mile/5280 feet can be used to convert between miles and feet, as there are 5280 feet in one mile.
this is Jeremy im improving this anser of " I don't know" its poiintless its where you wold cross multiply and if they eqall out they wold be porportional, if not its you gessed it not porportional. hope this helped you people. :)
It may be called the conversion factor.Note, however, that this only works when both measurements are absolute measurements, or equivalently, the measurement is on a ratio scale. For example, a fraction representing equivalent Fahrenheit and Celsius temperatures is not a conversion factor because the two Zero values do not correspond to the same temperature.
the term used to describe how consistently several measurements of the same quantity give same result is
Precision
precision
Precision
For two measurements to be a conversion factor, they must represent the same quantity but in different units. The ratio should equal 1 and can be written as a fraction where the units cancel out, allowing you to convert from one unit to another.
If you measure the same quantity repeatedly, a low variance in the measurements is a sign of high precision.
In a conversion factor, the numerator and denominator of the fraction represent the same quantity but are expressed in different units. This allows you to convert from one unit to another.
A unit conversion ratio