-4.9% is the change from 858 to 816
Calculation steps:
[( 816 - 858 ) ÷ 858] x 100 = -4.9%
Formula
Percentage change = [(816 - 858) / 858] x 100
Subtract the new number by the original number
816 - 858 = -42
-42 ÷ 858 = -0.04895104895104895
-0.04895104895104895 x 100 = -4.9%