Sum and Divide Calculation

Hello

In Excel this would be Sum(Monthly Overtime) / Annual Salary /12

Can you help work this out in DAX please? Answer is 214%

Month OT is £6548

Annual Salary is £36,702

I created calculated columns Total Salary and Total Overtime.

I think the problem maybe when I use the month filter as the month filter will show the Month OT but will show the total annual salary. As, the spreadsheet I'm using always just shows annual salary.

Do I need to use the column instead on the measures?

Need anything please ask?

Thanks

Ross