Electricity expenses under gst

Hemant Kumar (Student CA Final) (74 Points)

15 August 2017  
I am registered dealer under gst and I have an electricity connection which is used in both domestic & business use
Please guide me how much % of electricity bill is consider for business use and how much % is consider for domestic use
Electricity expenses will be show in gstr 3b under non gst supply
So please help me