-87.99% is the change from 866 to 104
Calculation steps:
[( 104 - 866 ) ÷ 866] x 100 = -87.99%
Formula
Percentage change = [(104 - 866) / 866] x 100
Subtract the new number by the original number
104 - 866 = -762
-762 ÷ 866 = -0.8799076212471132
-0.8799076212471132 x 100 = -87.99%