Perjury is considered a serious offense as it can be used to usurp the power of the courts, resulting in miscarriages of justice. In the United States, for example, the general perjury statute under Federal law classifies perjury as a felony and provides for a prison sentence of up to five years.
Effective interest rate for t periods, i t = (1 + i) t - 1 or as one equation i t = (1 + (r / m)) mt - 1. The rate per compounding period P = R / m, in percent.
Method 1 Calculating Simple Interest. 1. Understand the interest expense formula. The formula to calculate interest is Interest = Prt where P equals Principal, or the amount of the loan outstanding, r equals the rate of interest charged, and t equals the amount of time that the loan will be outstanding.