I want to calculate the churn on a period of 7 month for a strategy. The strategy starts on 20-March so we dont have data before this point. I can calculate the monthly churn but I cant understand how can I move from this point to calculate the whole churn for the period March-September.
Month Lost+Down Previous Churn
Mar - - -
Apr 205 235 87.23%
May 40 907 4.41%
Jun 370 1542 23.99%
Jul 90 1730 5.20%
Aug 700 2948 23.74%
Sep 850 2010 42.29%