Percentage of Repeat Orders that match criteria
Formula
Repeat Order Rate = (COUNT DISTINCT(Order ID) WHERE Customer Order Count > 1 AND Dimension = xxx) / (COUNT DISTINCT(Order ID) WHERE Customer Order Count = > 1)
Explanation
This KPI is contextual - it's the percentage of first orders that fulfill a certain requirement.
In context of a product for example, the Repeat Order Rate will tell you what percentage of Repeat Orders contain this product.
Notes
Since an order can contain multiple products, the sum of this value across all products is likely going to be larger than 100%.