APR Calculation Formula

FEE (Origination fee + Interest)
divided by
AMOUNT FINANCED
divided by
NUMBER OF DAYS OF TERM OF NOTE
multiplied by
365
multiplied by 100 (this will put your decimal place in correct place)
=APR

Examples:
$15 / $100 / 14 X 365 X 100 = 391.07 APR ($100 loan for 14 days with $15 fee)
$12.50 / $50 / 14 X 365 X 100 = 651.79 APR ($50 loan for 14 days with $12.50 fee)