-0.58% is the change from 866 to 861
Calculation steps:
[( 861 - 866 ) ÷ 866] x 100 = -0.58%
Formula
Percentage change = [(861 - 866) / 866] x 100
Subtract the new number by the original number
861 - 866 = -5
-5 ÷ 866 = -0.005773672055427252
-0.005773672055427252 x 100 = -0.58%