Hi agus,
i got the 46...% figure. You can test this by setting up a cal row and entering your data directly into the cal line/ cell.
If you still get 47% then I believe that you got rounded data transferred from your AX system.
Can you possibly check in the MR data mart what figures are transferred from AX. (you might need a SQL expert to help you as you might not have all necessary access rights)
If nothing helps contact MS as this might be a shortcoming. I guess MR might have a problem with the many numbers you have.
All the best,
Ludwig