I want create line chart that calculate growth rate of sales relative to previous month.
it mean in dimension we have month name and in expression growth rate of sales.
for example for year 2018:
Growth rate of sales(January-2018) = (Sales(January-2018)-Sales(December-2017))/Sales(December-2017)*100
Growth rate of sales(February-2018) = (Sales(February-2018)-Sales(January-2018))/Sales(January-2018)*100