Help with below query

[chandankr]

100 * sum([x]) / sum([y] - [z])

[yuanliu]

Pro tip: When asking a question in a forum about data analytics, first explain your data, with anonymized sample if possible, explain what you are trying to achieve and, if you illustrate sample code, also illustrate the output and explain why the output doesn't meet your requirements.  "Help with" is not a question without other qualifiers.

[chandankr]

trying to fetch some values and apply this athematic to get some relevant info for dashboard.

100 * sum([M8020C3]) / sum([M8020C6] - [M8020C4])

using the below splunk query 

index=* "M8020C3" AND "M8020C6" AND "M8020C4"
| rex field=_raw "<measResults>\d+\s\d+\s\d+\s+(?<cell_avl3>\d+)\s(?<cell_avl4>\d)\s\d+\s+(?<cell_avl6>\d+)"
| stats sum(cell_avl3) as cell_avl3 sum(cell_avl6) as cell_avl6 sum(cell_avl4) as cell_acl4
| eval cell_avl5 = cell_avl6-cell_avl4
| eval cell_avl10=cell_avl3/cell_avl5
| eval cell_avl=100*cell_avl10
| stats count by date_month,cell_avl