-88.8% is the change from 866 to 97
Calculation steps:
[( 97 - 866 ) ÷ 866] x 100 = -88.8%
Formula
Percentage change = [(97 - 866) / 866] x 100
Subtract the new number by the original number
97 - 866 = -769
-769 ÷ 866 = -0.8879907621247113
-0.8879907621247113 x 100 = -88.8%