interest rates are expressed as a percentage of\ninvestment fees.\nthe loan.\nthe profit.\ntaxes owed.

Brief Explanations:

Interest rates represent the cost of borrowing or the return on lending. They are calculated as a percentage of the principal amount of a loan. Investment fees are charges for investment - related services, profit is the gain from business activities, and taxes owed are amounts due to the government. Interest rates are based on the loan amount.

Answer:

the loan.