Here is the full question used in answering this question :
Francine wants to find a total of 2/3 cup of blueberries and 5/8 cup of raspberries what is the least common denominator of the fractions
Least common denominator of fractions is the smallest number that can divide both the denominator of 2/3 and the denominator of 5/8. The denominators here are 3 and 8