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simple interest rate formula math. An example of a simple interest calculation would be a 3 year saving account at a 10 rate with an original balance of 1000. I Prt becomes r IPt Remember to use 1412 for time and move the 12 to the numerator in the formula above.
With r annual rate of simple interest t time in years the simple interest is calculated as I Prt. The Simple Interest FormulaInterest Principal x Rate decimal x TimeIn this quick video you will use the formula for simple interest to solve a practice. The time is the duration or the time the money is invested or borrowed in years.
R and t are in the same units of time.
Click on the Calculate button to calculate. To find the interest you can use this formula. The principal is the amount of money you borrow or invest. The fixed monthly mortgage repayment calculation is based on the annuity formula and it is mathematically represented as Fixed Monthly Mortgage Repayment Calculation P r 1 rn 1 rn 1.