Answer:
b. 130%
Explanation:
As you are interested in evaluate the process of calculating the percentage of sales of 2015 respect to 2013 you can use the next formula:
[tex]%Sales=\frac{780.000}{600.000}[/tex]
[tex]%Sales=130%[/tex]
What this result means is that respect to 2013 year the company has sold in 2015 130% more. there is important to bear in mind that this doesn't implies, the sales of 2014, it means that there are no cumulative sales, just the result of 2015 compared agains 2013
