Kaniyajenkinsgo Kaniyajenkinsgo Mathematics Answered here are 33.8 fluid ounces in a liter. There are 128 fluid ounces in a gallon. About how many liters are in a gallon? a. 2 b. 3 c. 4 d. 5 2.Is your estimate larger or smaller than the actual number of liters in a gallon? Explain how you know?