Top 20% ~ Pareto Principle

srburk

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I am trying to determine the top 20% medications used in each clinic at a hospital. How can I create a query and or report to show me only the top 20% (per clinic)?

Example of entry:

Medication Clinic Totals
FAMOTIDINE 20 MG TAB NGI 8
LANOXIN 0.25 MG TAB NGI 2
METHOTREXATE 10 MG NGI 1

There are multiple clinics. There are over 50,000 total records. I just want the report to list the top 20%. :confused:
 

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