SELECT TOP 10 R_Fou_Mt_PerOld.INTI, Sum(R_Fou_Mt_PerOld.MTHTVA) AS SommeDeMTHTVA, Sum([R_Fou_Mt_PerOld]![MTHTVA]/[R_Fou_Ca_Old_Tot]![SommeDeMTHTVA]*100) AS PctFROM R_Fou_Mt_PerOld, R_Fou_Ca_Old_Tot
GROUP BY R_Fou_Mt_PerOld.INTI
ORDER BY Sum(R_Fou_Mt_PerOld.MTHTVA) DESC;