How can I get a result in negative time?

[excel on the run]

eg 0:10-0:11 result as -0:01 minutes

 

[Special-K99]

What does this mean?

0:10-0:11

Thats not a proper time for a start.

UPDATE: Got it, it's a calculation not a value. Two columns in a time implies it's a value.

 

[oldbrewer]

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[TD="align: right"]09:30[/TD]
[TD="align: right"]11:15[/TD]
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[TD="align: right"](01:45)[/TD]
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[TD="colspan: 3"]just format as (hh:mm)[/TD]
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[bugmonsta]

Hi,

A simple way is to Click File > Options > Advanced and look for a section called "When Calculating this workbook", in here TICK the "use 1904 date system" and your negative time will be displayed.

as per your sample, standard formatted time is hhmm so your data would be - 00:10 - 00:11 and this would display -00:01, to get it display as -0:01 then you would need to format the cells as custom time h:mm

 

[excel on the run]

Thanx for the great reply.
When I click, File , however I dont see an options menu, or advanced menu

I'm using Excel 2011 for iMac

 

[oldbrewer]

[TABLE="width: 448"]
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[TD="class: xl22, width: 64, align: right"]09:30[/TD]
[TD="class: xl22, width: 64, align: right"]11:15[/TD]
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[TD="class: xl22, width: 64"]-01:45[/TD]
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[TD="colspan: 2"]another way[/TD]
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[TD="colspan: 3"]="-"&TEXT(B1-A1,"hh:mm")[/TD]
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[bugmonsta]

Ah Mac....I have no access to them to try stuff...so building on oldbrewers suggestion, this will add a negative sign if the A2-b2 is less than zero, else it will just show the normal (positive) value.

To get this to work properly I did have to format my cells as time or with a custom format of h:mm to match your original figures

=IF(A2-B2<0, "-" & TEXT(ABS(A2-B2),"h:mm"), A2-B2)

See if that works for you and let us know