Because the interest rate of the provident fund loan is 3.25%, 1.5 million yuan is divided into 15 years, if the annual interest rate of the loan is 3.25%, the total interest is * * * 579307.60 yuan, the total repayment is 2079307.60 yuan, and the monthly payment is1/kloc-0.

Matching principal and interest: the total monthly repayment amount is fixed, in which the principal part increases month by month and the interest part decreases month by month. Calculation formula of equal principal and interest: monthly repayment amount = principal * monthly interest rate *( 1+ monthly interest rate) * loan months /( 1+ monthly interest rate) * repayment months-1.