-0.23% is the change from 861 to 859
Calculation steps:
[( 859 - 861 ) ÷ 861] x 100 = -0.23%
Formula
Percentage change = [(859 - 861) / 861] x 100
Subtract the new number by the original number
859 - 861 = -2
-2 ÷ 861 = -0.0023228803716608595
-0.0023228803716608595 x 100 = -0.23%