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c# - How to Convert decimal number to time or vice versa

here is an example

            if 8.30 is there it should be 8 hours 30 minute
            if 8 hour 20 minutes  then 8.20  

           Please tell whether it is possible ? if yes
           how ?      
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When people talk about decimal hours, they usually mean 0.1 = 6 minutes.

So, the correct formula to convert 8.3 would be:

8 hours + 3 * 6 minutes = 8:18

To convert 8:20 to decimal it would be:

8 + 20/6 = 8.333333 (probably round to 8.3)


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