Request an ownership table showing the percentage or units of the bank's share after each purchase payment, separate from the fee and expenses.
Steps
In a diminishing partnership, the installment may include more than one component, so the total remaining installments are not the same as the value of the bank's share.
The important figures are the share balance and the pricing mechanism used to purchase it.
The figures, fees and limits in this answer vary by bank and change over time — confirm them with your bank or the official source before acting.