I invite you to find an example in the attached capture. in the right table I want to put the following rule of calculation: (Value Month / Value 2015), ie : - France / January : (0.39 / 2708.25) - France / February : (0.41 / 2708.25) - France / March : (1.63 / 2708.25) - Usa / January : (28 / 150335) - Usa / February : (14 / 150335) - USA / March : (9 / 150335) but it does not work. when i set the calculation rule it shows me empty columns for each month. I can not recover the value of 2015 in the monthly straight table Thanks in advance.