Hi Jeet
This macro is asking for an input example 25% and then it would multiply the same with demand planner forecast to populate values in Marketing forecast.
This means when you select specific column(s) in planning book and execute this a pop-up will come which will ask for input. If you put 25 (which is % in this case) would calculate accordingly and will put the same in Marketing forecast.
Double click on first line "ONL_Add % for Marketing Forecast" and check if an icon has been assigned to the same for execution. If not then check to which event it is assigned.
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Regards
Rahul