First, we need to figure out how long it took Delilah to travel 500 miles. We can do this by dividing 500 by 65. This is equal to 7.69 hours, or 7 hours and 41 minutes.
Next, we figure out how long it took Mitch to drive 500 hours. We do this the same way: divide 500 by 60. 500/60 = 8.33 hours, or 8 1/3 hours.
We finish this problem by subtracting 7.69 from 8.33. This is equal to 0.64 hours, or 38 minutes. So, it took Mitch 0.64 hours or 38 minutes longer than Delilah to drive 500 miles.