Where A Final amount. How to calculate your interest. 7 312 years.
To use the simple interest formula we substitute in the values for variables that are given and then solve for the unknown variable.
Another type of problem you might run into when working with simple interest is finding the total amount owed or the total value of an investment after a given amount of time. T Time Periods involved. From the base formula A P 1 rt derived from A P I and since I Prt then A P I becomes A P Prt which can be rewritten as A P 1 rt Note that rate r and time t should be in the same time units such as months or years. Simple Interest SI P R T100.