Information
I'll assume the total distance from the starting point is in miles, since the rest of the questions is in miles.
The total distance that needs to be covered is 589.4 miles. Jonathan drove 208.62 miles already.
Steps
Simply subtract the total amount of miles (from your starting point to your destination point) to the total amount of miles driven.
589.40 (total miles)
- 208.62 (miles driven)
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380.78 (miles remaining)
Double-Check
If you'd like to double-check, simply add the miles remaining (your final answer) with the total amount of miles driven:
380.78 (miles remaining)
+ 208.62 (miles driven)
----------------------------------------
589.40 (total miles)
Final Answer
Jonathan needs to travel 380.78 more miles to reach his destination.