Answer: 8%
Explanation:
The Annual Percentage Rate or APR for short is calculated by dividing the finance cost by the total amount borrowed in the following manner,
APR = Finance Charge / Amount borrowed.
To calculate the Finance charge we add the interest and the service charge.
Finance charge = 25 + 15
= $40
Back to the APR formula we will have,
APR = Finance Charge / Amount borrowed
APR = 40/500
= 0.08
APR is 8%.