The calculation of bank interest rate is correct for single interest rate: \x0d\ 1. Daily interest rate _ monthly interest rate ÷30\x0d\2. Mistake. Daily interest rate = annual interest rate ÷365\x0d\ Explanation: daily interest rate = annual interest rate ÷360. In practical business, for the convenience of calculation, a year is often set to 360 days instead of 365 days. \x0d\3。 Correct. Monthly interest rate = annual interest rate ÷ 12\x0d\ For the calculation of compound interest, the above interest rate formula is different.