How to calculate the starting day date and ending day with the Total days

[chinnaupendra07]

should be the calculated as [prior year service days]/[total serivce days]% of functional amount of this transaction.

how can i calculate help me

starting date      ending date       Sum of functional_amount

 02/02/2022         27/02/2022         2578.0

 23/04/2022        23/05/2022          -3456.00

 12/03/2033        23/04/2023         -5423.087                                                                                                            

[Yoshiro_Fujimori]

@chinnaupendra07 

Could you define [prior year service days] and [total service days]?

Just counting the calendar days, or do you consider weekends and specific holidays?