A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
I assume you meant to write that W11 contains 08:00:00. That is, the time value for 8 hours. If than V11 contains 08:30:30 (the time value for 8 and a half hours) the difference between the two is 30 minutes. Half an hour or 30 minutes has a decimal value of 0.5/24 or 30/1440 = 0.02083333. What's not correct here?