equal repayment method, also known as equal repayment of principal and interest, refers to equal repayment of loan principal and interest on a monthly basis.

the characteristic of the equal repayment method is that the monthly repayment amount remains unchanged during the whole repayment period (except when the interest rate is adjusted), and the advantage is that the borrower can accurately grasp the monthly repayment amount and arrange the family's income and expenditure in a planned way.

equal principal and interest repayment method:

monthly repayment amount: a * [I * (1+I) n]/[(1+I) n-1]

Note: A loan principal I loan monthly interest rate n loan months

average capital repayment method:

monthly repayment principal: A. Dn

Note: A loan principal I loan monthly interest rate n loan months an loan residual principal in the nth month, a1=a,a2=a-a/n,a3=2-2*a/n ... The actual number of days in the nth month of DN is analogized, such as 28 in February, 31 in March, 3 in April and so on.