To calculate the percentage of travel time, you can use the following formula:
Percentage of travel time = (Travel time / Total time) x 100
In this formula, "Travel time" refers to the amount of time spent on travel, and "Total time" represents the overall duration of the trip, including both travel and non-travel time.
To calculate the percentage, divide the travel time by the total time, then multiply the result by 100 to convert it into a percentage.