-10.99% is the change from 819 to 729
Calculation steps:
[( 729 - 819 ) ÷ 819] x 100 = -10.99%
Formula
Percentage change = [(729 - 819) / 819] x 100
Subtract the new number by the original number
729 - 819 = -90
-90 ÷ 819 = -0.10989010989010989
-0.10989010989010989 x 100 = -10.99%