I am trying in spreadsheets to calculate  the hours spent at work. I have the formula right, it gets me to the result i need, but the program doesn't know how to display it (i goes H:MM, but i need something like [h]:mm). Because every 24 hours added it goes back to 0, so if i have 12 hours and add another 13 hours, instead of displaying 25 hours, it shows only 1 hour.

Any ideas?

(sorry for the bad spelling - not my first language)