How to convert duration to minutes in google spreadsheet?

Question

Google Sheets

There are several columns with duration (the sum of time =Sum(B47:B49) and the format "Duration")
I want to know the percentage of each column.

The main problem is to calculate the amount of minutes, so that later on this amount to calculate the percentage.
I tried to break it into Hour and Minute, but if the hours are more than 23 it does not work.

I'm trying to make formulas because manually counting is not an option. time is added every day and there may be more columns.

Example:


Here is the same problem, as soon as Duration (A3) becomes 24:00:00 then Hour(A3) becomes zero:

Answer 1

Because time is essentially a number too, just divide a certain time by the amount of time, and the share will be calculated.