Answer:
Abed must earn 13.5% or $108 annual interest to cover the monthly fee.
Explanation:
Abed should earn minimum $9 of interest on deposit each month to cover the bank charges expense.
Average Monthly Balance = $800
Bank Charges = $9.00 per month
Monthly interest rate = (Monthly bank charges / Monthly average balance ) x 100
Monthly interest rate = ( $9.00 / $800 ) x 100 = 0.01125 x 100 = 1.125%
Annual Interest rate = 0.01125 x 12 = 0.135 = 13.5%
Annual Interest = $800 x 13.5% = $108