Many times, I get inspiration to write about articles when I post responses to questions on Microsoft Community. The inspiration to write about this has come from following post - Percentages
You will also have many occasions particularly when you are asked to compute percentage change between two values. This is very much encountered in Finance industry where you have to report percentage growth for many parameters like revenue, cost etc. Economics has demand growth, supply growth and every other industry has their own growth metric. Telecom will have subscriber growth, ARPU growth and so on.
Note - The article is not about growth between percentage values i.e. it is not about growth between 20% and 30% but between absolute values.