When you know the principal amount the rate and the time the amount of interest can be calculated by using the formula. R Interest rate annually. Simple interest is the interest generated only from the principal.
Compound interest total amount of principal and interest in future or future value less principal amount at present or present value P 1.
The total compound interest generated is the final value minus the initial principal. It is a method for calculating the interest earned or paid on a certain balance in a specific period. Compound interest includes the interest generated on the principal and the accumulated interest from any previous period. I Interest rate expressed as a percentage eg.