Need help on DAX measures

Both solutions should work as expected. Using the sample PBIX file from Ritaf1983 and adding the formula I initially provided, it is evident that regardless of whether the resolution flag is "on-time" or "delayed," the result remains consistent for each month-year and experience center. The key difference between the approaches is that hers uses three measures, while mine relies on just one.

Can you please be more specific of what you really need? We've already provided you the formulas as well as screenshots of the report. Or do you want the same value for all months? If that is the case, please use this formula. Otherwise, please show us your expected result and not jus the data

Pct On-Time = 
// Calculate the total number of On-Time resolutions
VAR _OnTime =
    CALCULATE (
        SUM ( 'table'[count of number] ),
        FILTER (
            ALL ( 'Table'[Resolution Flag], 'Table'[Month-Year] ),
            'table'[resolution flag] = "On-Time"
        )
    ) // Calculate the total number of Delayed resolutions
VAR _Delayed =
    CALCULATE (
        SUM ( 'table'[count of number] ),
        FILTER (
            ALL ( 'Table'[Resolution Flag], 'Table'[Month-Year] ),
            'table'[resolution flag] = "Delayed"
        )
    )
RETURN
    // Calculate the percentage of On-Time resolutions
    DIVIDE (
        _OnTime,
        _OnTime + _Delayed
    )