The difference between the largest value and the smallest value is called Range.
$$ Range\ R = L - S $$
$$ Co\ efficient\ of\ Range = \frac {L - S}{L + S} $$
The difference between the largest value and the smallest value is called Range.
$$ Range\ R = L - S $$
$$ Co\ efficient\ of\ Range = \frac {L - S}{L + S} $$