Percent Change (% Chg)
Usually calculated as (this year – year ago) / year ago. Should not be used for measures that are already expressed as a %.
Point Change (Pt Chg)
Similar to Absolute Change, often used for measures that are already expressed as a %. For example, when comparing 10.3% to 15.6%, the point change would be 5.3 points.
Price Decrease
See Temporary Price Reduction (TPR).
Price per EQ
Price paid by shoppers per equivalized unit (pounds, ounces, or whatever weight measure is used in your category). Best to use when comparing prices of products of different sizes. See Equivalized Sales.
Price per Package
Price paid by shoppers per package that they buy. Used primarily when comparing prices of products of the same size though might violate this rule for a specific analysis (e.g. comparing Price per Package across sizes to estimate average price gaps between large size and small size).
Price per Unit
See Price per Package.