What is the ratio of the money spent on each of the advertisements taken one from each of NY Times, The Telegraph, and Others for the year 2021 to tha...
Question

What is the ratio of the money spent on each of the advertisements taken one from each of NY Times, The Telegraph, and Others for the year 2021 to that of the money spent on each of the advertisements taken one from each of NY Times, The Telegraph, and Others for the year 2018?