-86.14% is the change from 866 to 120
Calculation steps:
[( 120 - 866 ) ÷ 866] x 100 = -86.14%
Formula
Percentage change = [(120 - 866) / 866] x 100
Subtract the new number by the original number
120 - 866 = -746
-746 ÷ 866 = -0.8614318706697459
-0.8614318706697459 x 100 = -86.14%