-8.39% is the change from 858 to 786
Calculation steps:
[( 786 - 858 ) ÷ 858] x 100 = -8.39%
Formula
Percentage change = [(786 - 858) / 858] x 100
Subtract the new number by the original number
786 - 858 = -72
-72 ÷ 858 = -0.08391608391608392
-0.08391608391608392 x 100 = -8.39%