Which type in interest is figured on a specified time frame?

The type of interest that is calculated over a specified time frame is called "simple interest." Simple interest is determined using the formula ( I = P \times r \times t ), where ( I ) is the interest earned, ( P ) is the principal amount, ( r ) is the annual interest rate, and ( t ) is the time in years. It is straightforward and does not take into account any compounding, making it easy to calculate over fixed periods.