Calc: Using data from pivot table

[MarkRockNY]

I have a spreadsheet to keep track of what I eat daily:

Date	FoodItem	Protein	Fat	Carbs	TotalGrams

Based on this I defined a pivot:

	Data
Date	Sum - Protein	Sum - Fat	Sum - Carbs	Sum - TotalGrams
Total Result

This is all in grams. How do I now calculate % of Protein, Fat, Carbs, per day? I can do this by adding formulas outside the pivot, but then it is hard-bound to cells. I there is any change in pivot, then all references will fail.
Thanks

[Villeroy]

The pivot can do this without formulas.
ask120558.ods (149.1 KB)