This error probably means that "Start Plan#" and "Start Actual#" are just columns and Power BI is helpfully creating implied measures to aggregate these. So if you right click on one of the two tables and choose the "New Measure..." option then enter something like the following it should work:
Progress = DIVIDE ( SUM( 'table1'[Start Plan#] ) , SUM ( 'table2'[Actual Plan# ) )
Note: you'll need to replace 'table1' and ''table2' with the actual names of your 2 tables
And I would have expected that you would want to do actual / plan so that you could say that you've reached x% of the plan...
it worked! thanks very much!
one last question, can i put 0% or something in the other way?
because i am thinking to colour them base on the perscontage in next step so feel like need to put some figure in it to remark.
> but it made others calculated the other around.
What do you mean by this? Ashish's answer looks like it's calculating exactly how you requested ( plan / actual )
So the two lines you've highlighted 52/ 51 = 102% and 10 / 2 = 500% appear to be work exactly as you requested. I did query this in my earlier response as I would have expected that the calculation would have made more sense as (actual / plan).
You might also want to consider making use of variables in this expression as it should make it easier to read. And if the actual / plan are around the wrong way you can just swap this in the DIVIDE function.
VAR _actualSum = SUM ( 'table2'[Actual Plan# )
VAR _planSum = SUM( 'table1'[Start Plan#] )
, DIVIDE ( _planSum , IF(ISBLANK(_actualSum),10, _actualSum ))