Formula Of Compound Interest. Compound interest is when interest is earned not only on the initial amount invested, but also on any interest. Compound interest, or 'interest on interest', is calculated with the compound interest formula.
General compound interest formula (for daily, weekly, monthly, and yearly compounding). Think of it like this: The compound interest formula will determine a, the future value a particular investment will have.
Fv = pv(1+r)n, where fv is future value, pv is present value, r is the interest rate per period, and n.
So in this method, rather than paying out the interest, it is reinvested and becomes a part of the principal. Compound interest is when a bank pays interest on both the principal (the original to calculate compound interest use the formula below. In other words, interest that is not paid within the compound interest is calculated on loans using the same formulas. Compound interest is interest that builds upon its own previous interest over the initial balance.
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