Question 20

Explanation

We need to calculate the total loan amount after interest, then divide it by the repayment period to find the monthly installment.

First, calculate the total interest percentage for the loan period. Since the interest is given per year ($12$ months) and the loan duration is $15$ months, the time proportion is:

Next, calculate the nominal interest in Rupiah based on the principal loan of $Rp4,500,000.00$:

The total amount to be repaid is the sum of the principal and the interest:

Finally, divide the total loan by the repayment period ($15$ months) to get the monthly installment:

Thus, Zul must pay $Rp360,000.00$ each month.