In this step, you define the ratio of the proportion unit to the base unit. This ratio is needed to convert proportion units to base units of measure.
A fruit juice contains vitamin C. You want to
specify the vitamin C content of the drink in milligrams per liter.
To do this, in this table, define VC2 (milligrams of vitamin C per liter)=VC1
(milligrams of vitamin C) / liter (L).