-0.23% is the change from 860 to 858
Calculation steps:
[( 858 - 860 ) ÷ 860] x 100 = -0.23%
Formula
Percentage change = [(858 - 860) / 860] x 100
Subtract the new number by the original number
858 - 860 = -2
-2 ÷ 860 = -0.002325581395348837
-0.002325581395348837 x 100 = -0.23%