First off, to solve this problem we need to determine the rate at which Anna was traveling. If Anna drove 696 miles in 12 hours, we can divide 696 by 12 to determine how many miles Maria travels per hour:
696miles/12hours = 58 miles/hour
Next, we can determine how long it would take for Anna to drive 406 miles. If she takes 1 hour to drive every 58 mile segment of the trip, we can divide 406 miles by 58 miles to determine the number of 1-hour segments there are in her long trip. In other words, dividing 406 by 58 will tell us how many hours the 406 miles trip will take.
406miles/58=7 hours
The finals answer to the question is that it would take Anna 7 hours to travel 406 miles at the same rate.