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Interest rate is the fee charged by a lender to a borrower for the use of borrowed money, usually expressed as an annual percentage of the principal. The rate is dependent upon the time value of money, the credit risk of the borrower, and the inflation rate. Establish if the loan was to attract an interest. If the rate of interest was for example 12.6 per cent per year put 12 in the 1st cell and 6 in the second cell.
Some lenders may not use these factors to determine the rate. For example if one borrowed Kshs 1,000 which he/she is supposed to pay back at a total of Kshs. 1,100 in one month, then the rate of interest would be computed as follows
IR = (1,100-1000)*100%/1000 = 10% per month
which translate into 120% per year