Question 1013399
8 gallons fills 7/8-1/2 of the tank. This means that to fill 3/8 of the tank you need 8 gallons. To fill 1/8 of the tank, you need 1/3 as much gas, so 8/3 gallons. To fill 8/8 of the tank (the whole tank) you need 8/3*8 gallons, or 64/3 gallons.