Answer: 2016 = 28.18 %
2017 = 40.03 %
Explanation: Cost of goods sold as a percentage of net sales can be calculated as follows :-
[tex]percentage=\frac{cost\:of\:goods\:sold}{net\:sales}[/tex]
so by putting the values into equation for the two years :-
year 2016
[tex]percentage=\frac{137,390}{487,400}[/tex]
= 28.18 %
year 2017
[tex]percentage=\frac{241,900}{604,200}[/tex]
= 40.03 %