Divide the Annual Percentage Rate by 365 days (# of days in a year) to get the daily rate. Multiply the principal balance by the daily rate and then multiply that by the number of days from your last payment until this payment.
Divide the Annual Percentage Rate by 365 days (# of days in a year) to get the daily rate. Multiply the principal balance by the daily rate and then multiply that by the number of days from your last payment until this payment.