If you're picturing a stress-free retirement where you live off investment interest, use this easy formula to calculate how much of a principal you'll need.

When you put money into a savings account, the bank will use your money, for example by lending it to other people. They will pay you a certain amount for allowing this. The money they pay you is ...

When you borrow money, you’ll also pay interest on top of the amount you borrowed.. Interest is the money the lender gets for loaning you the money. Read Next: 5 Subtly Genius Moves All Wealthy People ...

India celebrates National Mathematics Day on December 22 to commemorate the birth anniversary of the Indian mathematician Srinivasa Ramanujan. He shaped twentieth-century mathematics with his ...