The loan of 10500 yuan will be paid off in two months, with a monthly repayment of 927 yuan and interest of 5.9 ‰. 12 months times 927 equals 1 1 124 yuan. 1 1 124 yuan minus 10500 equals 624 yuan (interest), and 624 divided by 10500 equals 0.059. Interest is the use fee of money in a certain period of time, and it refers to the reward that money holders (creditors) get from borrowers (debtors) for lending money or monetary capital. Including deposit interest, loan interest and interest generated by various bonds. Under the capitalist system, the source of interest is the surplus value created by hired workers. The essence of interest is a special transformation form of surplus value and a part of profit.