Tableau calculated field : i’m trying to create calculated field in tableau

i’m trying to create calculated field in tableau, my query is below:

SUM(IF([Qtr]='2018-Q1' OR [Qtr]='2018-Q2' OR [Qtr]='2018-Q3' OR [Qtr]='2018-Q4')
 THEN FLOAT([Channel Mix]) END) / FLOAT([Revenue])

i’m getting error saying cannot mix agreegate and non agreegate comparison.

Final objective is to divide with revenue column .

Please help

Answer

It appears that your numerator is a sum (an aggregation) but your denominator is not. Try dividing by: / sum(FLOAT([Revenue]))