-84.41% is the change from 866 to 135
Calculation steps:
[( 135 - 866 ) ÷ 866] x 100 = -84.41%
Formula
Percentage change = [(135 - 866) / 866] x 100
Subtract the new number by the original number
135 - 866 = -731
-731 ÷ 866 = -0.8441108545034642
-0.8441108545034642 x 100 = -84.41%