if you owe 564.60 and the percentage is 26.99 how much interest do I owe? if I pay the loan in three months

Assume that the annual interest rate is 26.99%, that the loan is at simple interest, and that the calendar is such that 3 months is 1/4 of a year.

I=PRT

I=64.60×26.99/100×1/4=38.096835=38.10