Calculate Remaining Distance: Running 39km at 9km/h After 3 Hours

To solve this problem, let's go through these steps:

• Step 1: Calculate the distance Ron has already covered. Given his speed of 9 km/h and time of 3 hours:
  $\text{Distance covered} = 9 \, \text{km/h} \times 3 \, \text{hours} = 27 \, \text{km}$
• Step 2: Find the remaining distance Ron needs to run:
  $\text{Remaining distance} = 39 \, \text{km} - 27 \, \text{km} = 12 \, \text{km}$
• Step 3: Calculate the percentage of the route remaining:
  $\text{Percentage remaining} = \left( \frac{12 \, \text{km}}{39 \, \text{km}} \right) \times 100 \approx 30.77\%$

Therefore, rounding to the nearest whole number, approximately 31% of Ron's running route remains.