Help with Formula/ Power query to get the number of matching row counts of codes

Hi Sergei, Really appreciate your response...The only problem with this is that the percentages are going beyond 100 when the number of times the code is present in predictedcode is greater than the number of times the code is present in the agentcode...So the logic that I am looking to build is that for a unique code in the agentcode (Number of encounters that have the matching code in predictcode for the agent code)/ total number of encounters with code in the agent code column.. An encounter is a combination of ctext id and visitbillid... For example consider a agentcode C102 for an encounter (ctextid:3421 vbillid : 231) if the same code is present in predictcode for the same encounter(ctextid:3421 vbillid : 231 then the matching count is 1 ..(Numerator -> Number of matching counts for the code/ Denominator -> Number of times the code appears in the agentcode column)..Basically I am trying to calculate the precision for a particular agent code