Credit card installment repayment principal multiplied by the rate is the interest payable, plus the principal is the total repayment amount, divided by the number of installments is the repayment amount per installment. 12 installment repayment interest is: 32,000× 0.72 %×12 = 2,764.80 yuan, and the principal and interest of each installment are (32,000+2,764.80) ÷12 = 5431.47 yuan. The principal of credit card installment repayment is repaid from the first installment, so the real interest rate of credit card installment repayment is twice the nominal interest rate, that is, 0.72 %× 2 = 1.44%, and the annual interest rate is1.44 %×12 =16.8%, which is relatively high.