Dividing by Avg Where

[bazzaonline]

Hello,  I have a table and which has months in the first column and an AVG field in the second,  I need a formula that divides the AVG Month figures by a specific months AVG. 

For example each months Avg Figure divided by the Avg figure for Jan 2020 (202002).

Any Ideas?

[StarinieriG]

Hi,

try to create the value in a variable, then use that inside the expression.