-88.22% is the change from 866 to 102
Calculation steps:
[( 102 - 866 ) ÷ 866] x 100 = -88.22%
Formula
Percentage change = [(102 - 866) / 866] x 100
Subtract the new number by the original number
102 - 866 = -764
-764 ÷ 866 = -0.8822170900692841
-0.8822170900692841 x 100 = -88.22%