-0.23% is the change from 872 to 870
Calculation steps:
[( 870 - 872 ) ÷ 872] x 100 = -0.23%
Formula
Percentage change = [(870 - 872) / 872] x 100
Subtract the new number by the original number
870 - 872 = -2
-2 ÷ 872 = -0.0022935779816513763
-0.0022935779816513763 x 100 = -0.23%