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Excel is calculating over 100% and I do not know why

Solved by I. E. in 27 mins

I need help calculating sleep efficiency. The formula is calculating correct in some rows but not in others.
Also, when calculating an average, the correct answer is not coming up.

Solved by Z. E. in 21 mins

When I insert a time in a field with a formula, excel is not calculating the equation until i close the sheet?????

Solved by T. L. in 20 mins

hello
i want to put data in excel sheet
only showing +16.00 - 16.00
i do not calculating them
only
how to do this

Solved by F. Q. in 12 mins

I need help calculating probability in excel

Solved by K. H. in 15 mins