The rate of return expressed in form of percentage and also known as ROR. The standard formula for calculating ROR is as follows. Percentage of Days spent in USA 5 15 100 3333.
A video tutorial on using our calculator as well as a walk through of the calculations and formulas is shown here.
The excel formula for percentage is Portion Days Total Days 100. When you know the principal amount the rate and the time the amount of interest can be calculated by using the formula. 1 For example if a credit card has an APR of 10 you might pay roughly 100 annually per 1000 borrowed. The rate of return formula is equal to current value minus original value divided by original value multiply by 100.