Pn= P0(Snp/sn0*0,8)+0,2 PO is: 1,454.97 Snp is :20.4558 Sn0 is: 20.0082 What formula I need to use and what is the Pn Thank you :)

Pn= P0(Snp/sn0*0,8)+0,2
PO is: 1,454.97
Snp is :20.4558
Sn0 is: 20.0082

What formula I need to use and what is the Pn Thank you :)

 

Is for an indecsation