a portion that represents the whole
Every fraction has infinitely many equivalent fractions. A representative fraction is one member of this set.
The advantage of representative fraction is that any unit of distance may be adopted.
The fullform of R.F is representative fraction
An RF scale is a Representative Fraction (RF) Scale
It's called the "scale."
How many parts of the total you have in the fraction.
The fraction itself.
The denominator tells you the total of the pieces in the fraction.