-3.58% is the change from 866 to 835
Calculation steps:
[( 835 - 866 ) ÷ 866] x 100 = -3.58%
Formula
Percentage change = [(835 - 866) / 866] x 100
Subtract the new number by the original number
835 - 866 = -31
-31 ÷ 866 = -0.03579676674364896
-0.03579676674364896 x 100 = -3.58%