To do your own calculations you may need to convert percentages to decimals. 100 x05 x 1 5 simple interest for one year Note that the interest rate 5 appears as a decimal 05. Interest may be computed as simple interest which is calculated by multiplying the amount of money borrowed by the interest rate and the length of the loan.
To use the simple interest formula we substitute in the values for variables that are given and then solve for the unknown variable.
Examples of finding the interest earned with the simple interest formula. Remember that in the formula the principal P is the. Simple Interest Rate Principle Rate of Interest Time Period years 100. In simple in it also written as Simple Interest rate PRT100.