All of you have learned the formula to calculate the compound interest in your school. Compound and simple interests are among the mathematical applications used in real life for years. At certain ...

Calculate the weighted average of interest rates in Microsoft Excel to compute the most accurate average interest rate among a group of lenders who received different rates. When you take a weighted ...

Annuities represent a loan or investment which offer monthly fixed payments until the account is depleted or paid off. Whether you are investing or borrowing money does not change the calculation. As ...

Claire Boyte-White is the lead writer for NapkinFinance.com, co-author of I Am Net Worthy, and an Investopedia contributor. Claire's expertise lies in corporate finance & accounting, mutual funds, ...