Determining the Outstanding Balance of a Loan

Lets say that exactly ten years ago you took out a $200,000, 30-year mortgage with an annual interest rate of 9 percent and monthly payments of $1,609.25. But since you took out that loan, interest rates have dropped. You now have the opportunity to refinance your loan at an annual rate of 7 percent over 20 years. You need to know what the outstanding balance on your current loan is so you can take out a lower-interest-rate loan and pay it off. If you just made the 120th payment and have 240 payments remaining, whats your current loan balance?