Discovery Education
Discovery Education: Web Math: Math for Everyone
Provides online programs and explanations on everyday math: calculating a tip at a restaurant, determining the sale price of an item, finding the odds of winning a lottery, computing simple and compound interest, and more.
University of Toronto (Canada)
Answers and Explanations Simple and Compound Interest
If a bank account produces "simple interest", the interest is paid directly and does not become part of the account's interest-bearing balance. That balance remains constant, and it's easy to figure out how much money you earn. This site...