-10.14% is the change from 858 to 771
Calculation steps:
[( 771 - 858 ) ÷ 858] x 100 = -10.14%
Formula
Percentage change = [(771 - 858) / 858] x 100
Subtract the new number by the original number
771 - 858 = -87
-87 ÷ 858 = -0.10139860139860139
-0.10139860139860139 x 100 = -10.14%