Answer:
inflation
Explanation:
The real interest rate charged on a loan = nominal interest rate - inflation rate
The inflation rate is the change in the general level of prices, and as the inflation rate increases, the purchasing power of the currency decreases. For example, if you purchase 50 cans of Coke with $50 this year, and the inflation rate is 10%, you will only be able to purchase only 45 cans next year with the same $50.