In 1995, the cost of unleaded gasoline was $.95 per gallon. In 2010 the same type of gasoline costs $3.00 per gallon. To determine the amount of change, we have to use the what?
The amount of change in absolute terms is:
$3.00 - $.95 = ?
The proportional amount of change is:
(3.000 - .95)/.95 = ?
Are either of these what you are seeking?