you have 1/4 + 1/4 + 1/4 + 3/8 + 3/8 + 5/8 + 5/8 + 5/8 + 5/8 + 1 this can reduce to 3/4 + 6/8 + 20/8 +1 6/8 = 3/4 so you have 3/4 + 3/4 + 20/8 + 1 6/4 + 20/8 + 1 you can change the denominator to 4 to make it easier= 6/4 + 10/4 + 4/4 = 20/4 = 5 5 gallons