Interest rates math formula
8 Oct 2015 The simple interest formula allows us to calculate I, which is the interest earned or charged on a loan. According to this formula, the amount of In this case the "Interest" is $100, and the "Interest Rate" is 10% (but people often say "10% Interest" without saying "Rate") There is a formula for simple interest. 12 Nov 2018 To calculate compound interest, use the formula A = P(1 + r)n, where P is the principal, r is the interest rate expressed as a decimal and n is the