How do I keep Calc from defaulting to % every time I refresh the data in a pivot table?

When the data is refreshed on the pivot table it always defaults to %.

Calc Version:
Build ID: 420m0(Build:3)

Ubuntu 14.04
Linux Kernel 3.13.0-24


Format of cells in pivot table are managed through style. So modify the styles of the cells will prevent reset of format when refreshing.

How do I save the style? I can change the style but when I refresh it still goes back to percents.