What is 12 liters 9 quarts 3 gallons in least to greatest order?
To convert to a common unit, we should choose either gallons, quarts, or liters. In this case, it's easiest to convert everything to quarts because 1 gallon = 4 quarts and 1 quart = 0.25 gallons. Converting, we have 12 liters = 48 quarts, 9 quarts = 9 quarts, and 3 gallons = 12 quarts. Putting these in order of least to greatest: 9 quarts, 12 quarts, 48 quarts (or 3 gallons, 3 gallons, 12 quarts).