2

Basically you need to use a expression like this.

( Do a search for Tasks (Constraint: Creation Date > Current Date/Time : +Days {-30} :count / Do a search fot Tasks : count ) * 100

In this example you will the the value increased in the last 30 days as percentage.

If you really want the last month and not las 30 days you will need to use the Currents Date/Time like in the expression above, but then you will need to apply some changes to this date. In this case you need to replace the month in the date by using the change month to operator.

Then to set the month properly you will need to extract the Current Date/Time month and check if it is > 1. If so then reduce 1, if it is not > 1 this means the current month is January, so set the value to 12.

The same verification using the month need to be used to rebuild the year argument in the date. In this case the month verification is needed because of the current month is 1, this means is is January, so reducing you are going to type 12 do reflect December results, but December in this case are referencing the precious year, so if this verification returns true, just reduce 1 year from the current one.

I hope this can give you some ideas.