-15.82% is the change from 866 to 729
Calculation steps:
[( 729 - 866 ) ÷ 866] x 100 = -15.82%
Formula
Percentage change = [(729 - 866) / 866] x 100
Subtract the new number by the original number
729 - 866 = -137
-137 ÷ 866 = -0.1581986143187067
-0.1581986143187067 x 100 = -15.82%