-10.49% is the change from 858 to 768
Calculation steps:
[( 768 - 858 ) ÷ 858] x 100 = -10.49%
Formula
Percentage change = [(768 - 858) / 858] x 100
Subtract the new number by the original number
768 - 858 = -90
-90 ÷ 858 = -0.1048951048951049
-0.1048951048951049 x 100 = -10.49%