Round up/down duration

[priyadarshiom]

I am struggling to round up or round down the duration to a whole month (In my project the duration is shown in months)

if the duration is 5.1 to 5.4 - I would like to display 5 months -- if the duration is 5.5 - 5.9 - I would like to display 6 Months.

Thanks in advance for your assistance