Karen took 1hour 45mins to drive from Town A to Town B. She took another 25 mins drive from Town B to Town C. After that, she drove back to Town A. The journey from Town A to Town C and then back to Town A took 3h and 3mins. Find the percentage of time she spent driving back to Town A to Town C. Express your answer correct to 1 decimal place.

To find the percentage of time Karen spent driving back from Town C to Town A compared to the total time spent driving from Town A to Town C and back to Town A, we need to calculate the times for each segment of the journey.

First, let's convert the given times to minutes for easier calculations:
Karen took 1 hour 45 minutes to drive from Town A to Town B, which is 60 + 45 = 105 minutes.
She took another 25 minutes to drive from Town B to Town C.

Now, let's calculate the total time for the journey from Town A to Town C and back to Town A:
From Town A to Town C: 3 hours + 3 minutes = 3 * 60 + 3 = 183 minutes
From Town C back to Town A: 183 minutes - 130 minutes (105 minutes from A to B + 25 minutes from B to C) = 53 minutes.

To find the percentage of time spent driving back from Town C to Town A, we divide the time spent on that segment by the total time for the journey and then multiply by 100:

Percentage = (time spent driving back to Town A / total time for the journey) * 100
Percentage = (53 minutes / 183 minutes) * 100
Percentage ≈ 28.96%

Therefore, Karen spent approximately 28.96% of her time driving back from Town C to Town A compared to the total time spent driving from Town A to Town C and back to Town A.