Dividing the pie into, Felicia took the least and gave me the larger portion.
Is least correct or should it be lesser? It doesn"t sound right with lesser.
Assuming she divided the pie into two pieces, lesser is correct. A more common synonym is smaller.
In this case, the correct word to use is "least." "Least" is the comparative form of the word "little" and is used to compare three or more items. It implies that Felicia took the smallest portion of the pie, while you received a larger portion.
The word "lesser" is the comparative form of the word "little" when comparing only two items. However, in this context, since the sentence mentions three entities (you, Felicia, and yourself), we use "least" instead of "lesser."