How to Calculate Interest Earned on Money? Or, Does Money Grow on Trees?

How to Calculate Interest Earned on Money—is an essential tool, or skill, to use every day in order to be money wise and be a powerful person.  This story is teaches this tool, actually it gave a simple formula. The story is using real examples how to calculate earned interest in money accounts, in CDs, or how much a person pays interest in credit cards, or in home mortgages.  Easily, readers can master this simple formula.