interest rates are expressed as a percentage of\n○ investment fees.\n○ the loan.\n○ the profit.\n○ taxes 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 financial gain, and taxes owed are amounts due to the government. Interest rates are not based on these but on the loan amount.

Answer:

the loan.