Jessica is planning to buy a new car. The car price is $28,000 with a down payment of S10,000. Jessica was able to save the $10,000 for her dream car. If the monthly payment is $500 for 5 years, what is the annual nominal interest rate on this loan? What is the annual effective interest rate? Use interpolation if necessary. Excel solution is NOT accepted. Round the answer to 2 decimal places.
Please dont use PVIFA and show all work.
Solution:
Loan amount = $28,000 - $10,000 = $18,000
Monthly EMI = $500
Total periods = 60 monthly period
Let monthly rate of interest = i
Now at i rate of interest present value of installment is equal to loan amount.
Lets compute present value of installment at 1.50% and 2%
Present value of installment at 1.50% = $500 * Cumulative PV factor at 1.50% for 60 periods
= $500 * 39.38027 = $19,690
Present value of installment at 2% = $500 * Cumulative PV factor at 2% for 60 periods
= $500 * 34.76089 = $17,380
Interest rate (i) using interpolation = 1.50% + ($19,690 - $18000) / ($19,690 - $17,380) * 0.50
= 1.8658%
Annual rate of interest = 1.8658%*12 = 22.39%
Annual nominal rate of interest = 22.39%
Annual effective rate of interest = 1*(1.018658)^12 - 1 = 24.84%
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