-0.35% is the change from 864 to 861
Calculation steps:
[( 861 - 864 ) ÷ 864] x 100 = -0.35%
Formula
Percentage change = [(861 - 864) / 864] x 100
Subtract the new number by the original number
861 - 864 = -3
-3 ÷ 864 = -0.003472222222222222
-0.003472222222222222 x 100 = -0.35%