If you give it a bit of thought: It's actually correct that the detail numbers are not always summing up to 100% (the total line though will be 100%).
Let's say you have 4 detail percentages where the exact values are:
24.44,24.44,24.44,26.68
You want now these values listed with only one decimal. You would most likely use arithmetic rounding:
24.4,24.4,24.4,26.7
And well: This doesn't sum up to 100%. But where would you "cheat" and use another rounding algorithm?
I used to have a boss who never understood this. It was a pain!
Best you can do is add a footnote where you explain why the detail numbers might not add up to 100%.
HTH
Patrick
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