Addendum to J. Cilleruelo, D.S. Ramana, and O. Ramaré's paper “Quotient and product sets of thin subsets of the positive integers”

The purpose of this note is to prove two results on the quotient sets $A/A$ of finite sets $A\subset [1,n]$ of positive integers. They complement the results from the paper by J. Cilleruelo, D.S. Ramana, and O. Ramaré.