Subtract Hours From A Clock

Apr 13, 2014

im trying to subtract 19.2 hours from a clock and running into trouble.

formula in a1

a2 contains a date/time as 4-13-14 1:30 pm

a3 contains 19.2 (this is hours)

result should be a date/time like 4-12-14 9:10 am.

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