Percentage of nonperforming loans equals total nonperforming loans divided by total loans. Nonperforming loans are those loans that bank managers classify as 90-days or more past due or nonaccrual in the call report. Precisely, total nonperforming loans equals the sum of Total Loans and Lease Finance Receivables, Nonaccrual call item RCFD1403 and Total Loans and Lease Finance Receivables, Past Due 90 Days and More and Still Accruing call item RCFD1407. Total loans equals Total Loans and Leases, Net of Unearned Income call item RCFD2122. For more information and definition about the specific call item codes, please see http://www.federalreserve.gov/apps/mdrm/data-dictionary. This series is calculated by the Federal Reserve Bank of St. Louis using raw data that are collected by the FFIEC. Raw data can be found at https://cdr.ffiec.gov/public/.