1. The problem asks to find the percentage of a journey completed by walking. 2. To find the percentage, use the formula: $$\text{Percentage} = \left(\frac{\text{Distance walked}}{\text{Total distance}}\right) \times 100$$ 3. Identify the distance walked and the total distance of the journey. 4. Substitute the values into the formula. 5. Simplify the fraction and multiply by 100 to get the percentage. 6. The result is the percentage of the journey completed by walking.