a gas tank holds 13 1/2 gallons when it is 3/4 full. how many gallons of gas does the tank hold when it is completely full?​

Answer 1

13 1/2 = 27/2 = (3/4)F where F=full tank capacity

F = (4/3)(27/2) =2(9) = 18 gallons when completely full

or add 1/3 of 13.5 to 13.5 = 4.5 + 13.5 = 18 gallons