Final answer:
Jamie traveled an average of 6.7578125 kilometers each day by dividing the total distance of 4325 kilometers by the number of days, which is 640.
Step-by-step explanation:
Jamie traveled 4325 km in 640 days. To calculate the average distance Jamie traveled each day, we divide the total distance by the number of days.
Average distance per day = Total distance ÷ Number of days
Average distance per day = 4325 km ÷ 640 days
After doing the calculation, we find that Jamie traveled an average of 6.7578125 kilometers per day.