how do you subtract an hour or column value from a column which has a datetime format

how do you subtract an hour or column value from a column which has a datetime format
tatchis1Asked:
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Saurabh Singh TeotiaCommented:
Assuming you have time in A1 and hour in B1 then use this formula...
=a1-time(b1,,)
Saurabh...
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Saurabh Singh TeotiaCommented:
Alternatively you can also use this...
=a1-(b1/24)
Saurabh...
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TracyVBA DeveloperCommented:
Assuming you have a date and a time in A1, then try this in B1:

=A1-TIME(1,0,0)
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Microsoft Excel

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