The $80/20$ rule suggests thatMultiple Choicearound $80$ percent of a firms inventory should be readily available while $20$ percent should be reserved for emergency demand.nearly $80$ percent of a firms first$-$time users will become brand loyal while $20$ percent will use the product only once and then abandon it$.$about $80$ percent of a firms sales are obtained from about $20$ percent of its customers$\mathrm{.}80$ percent of a firms marketing program expenses are tax deductible while $20$ percent are not.about $80$ percent of a firms products will be sold to ultimate consumers while $20$ percent goes to organizational buyers.