Stop  OK  Stop There is no policy stating that simple arithmetic calculations including percentages are forbidden Such calculations done for clarity consistency andor comparison purposes are perfectly valid such do not fall under WPOR Of course the calculated figures are no better than the numbers they are based on and care must be taken to avoid any such implication A simple example is the calculation and addition of metric units when measurements are given in a nonmetric system here care must be taken to avoid changing the precision of the measure So do the calculations and add the percentages and violetriga wont revert without a specific and clear policy Meanwhile Fill  your comments are getting quite pointy please tone it down a bit On with improving the article and quit the qubbling