After 150 miles, Beth will have used 150x 1/30 = 5 gallons, which leaves 10 gallons remaining in the tank.After 150 miles, Darcy will have used 150x 1/25 = 6 gallons, which leaves 10 gallons remaining in the tank. Meaning they will have the same number of gallons left at 150 miles
20/3 - Take the 6 2/3, multiply the 6 and the 3 (6 x 3 = 18), then add the 2 (18 + 2 = 20). Put that number over the original 3 and you've got yourself a mixed number.
