A classic car increases in value from $5000 to $20000 over a period of 30 years

Use the formula r=(f/p)^1/n - 1

Pamela has a 30-year, 5.75% mortgage on her $250,000 home. she has been paying on it for 5 years, and has recently hit some financial trouble. if her lender agreed to lower the interest rate on her $231,905.47 balance to 5.5%, what will her new payment be for the remainder of the loan?