+118608 Do you mean
What time is it 21hours and 58 minutes ealier than 4:36pm?
It is 21hours and 22min and 36 minutes ealier than 4:36pm?
It is 24hours and 22min ealier than 4:00pm +3hours?
It is 22min ealier than 7:00pm the day before?
It is 6:28pm the day before.
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You can also do it easily on a standard hand held calculator
4 [o ' "] 36 [o ' "] - 21 [o ' "] 58 [o ' "] =
(the answer will be negative meaning that it was yesterday so) + 24 o ' " = answer: 6:28
it was entered as pm so it is still pm. It may lead to less confussion if you used 24 hour time.
