-2.77% is the change from 866 to 842
Calculation steps:
[( 842 - 866 ) ÷ 866] x 100 = -2.77%
Formula
Percentage change = [(842 - 866) / 866] x 100
Subtract the new number by the original number
842 - 866 = -24
-24 ÷ 866 = -0.02771362586605081
-0.02771362586605081 x 100 = -2.77%