Answer:
APR is 330% and EAR is 1745.53%
Step-by-step explanation:
Given:
Monthly interest rate = 27.5%
APR or annual percentage rate = 27.5×12 = 330%
So, Big Dom should report an APR of 330% to customers.
EAR or effective annual rate =

Here,
APR is 330% and m is 12
330÷12 = 27.5%
substituting the value in the above formula:
EAR =

= 17.4553 or 1745.53%