The quantity of lemonade that Regan sold on saturday given the amount sold by Mark is 1 11/12 gallons.
Fractions are non-integers that consist of a numerator and a denominator. A proper fraction is a fraction in which the numerator is less than the denominator. e.g. 2/3. A mixed fraction is made up of a whole number and a proper fraction. An example is 2 7/8.
2 7/8 x 2/3
23/8 x 2/3 = 23/12 = 1 11/12 gallons
To learn more about multiplication of fractions, please check: https://brainly.com/question/1114498