-2.26% is the change from 886 to 866
Calculation steps:
[( 866 - 886 ) ÷ 886] x 100 = -2.26%
Formula
Percentage change = [(866 - 886) / 886] x 100
Subtract the new number by the original number
866 - 886 = -20
-20 ÷ 886 = -0.022573363431151242
-0.022573363431151242 x 100 = -2.26%