The correct answers are:
- LOWER
- HIGHER
When the repayment schedule of the mortgage is calculated, the total amount of the loan (called principal) is divided in a number of identical monthly instalments. In the 30 year mortgage, as the principal is divided into a larger number of months, the amount due on each of them is lower.
The interest is accrued when a payment is made every month. As in the 30-year loan there is a larger number of repayments the aggregate amount repaid in terms of interest in much larger than in the 15-year one. As in both the repayment of the principal is exactly the same, the cost of the 30 year mortgage is larger.