DAX code
Reopen Rate =
VAR ReopenedTickets = CALCULATE(COUNTROWS('Tickets'), 'Tickets'[WasReopened] = TRUE)
VAR ClosedTickets = CALCULATE(COUNTROWS('Tickets'), 'Tickets'[Status] = "Closed")
RETURN
DIVIDE(ReopenedTickets, ClosedTickets)
Expresses the percentage of closed tickets that were later reopened.
Type your table and column names once. Every measure below updates.
Reopen Rate =
VAR ReopenedTickets = CALCULATE(COUNTROWS('Tickets'), 'Tickets'[WasReopened] = TRUE)
VAR ClosedTickets = CALCULATE(COUNTROWS('Tickets'), 'Tickets'[Status] = "Closed")
RETURN
DIVIDE(ReopenedTickets, ClosedTickets)
Replace 'Tickets'[WasReopened] with whatever flag or reopen-count column your ticketing system tracks.
Browse all 175 measures in the Power BI DAX Measures Library, or search the library for something similar to Reopen Rate.