Answer :
Bank interest is when you leave money in the bank for saving purposes. Then the money stays in the bank and you get money for keeping your money in the bank.
Explanation:
An interest rate is the amount of interest due per period, as a proportion of the amount lent, deposited, or borrowed. The total interest on an amount lent or borrowed depends on the principal sum, the interest rate, the compounding frequency, and the length of time over which it is lent, deposited, or borrowed