-15.97% is the change from 858 to 721
Calculation steps:
[( 721 - 858 ) ÷ 858] x 100 = -15.97%
Formula
Percentage change = [(721 - 858) / 858] x 100
Subtract the new number by the original number
721 - 858 = -137
-137 ÷ 858 = -0.15967365967365968
-0.15967365967365968 x 100 = -15.97%