arthursouza200p8h4c0 Less é um comparativo: I have less money than John.
Já least é um superlativo: I have the least salary in the company.

StRiGnAdO I) Less is the comparative form. Example:

Paul is less rich than Carl.

II) Least, in turn, is the superlative form of "less". Example:

Peter is the least rich among his friends