-91.8% is the change from 866 to 71
Calculation steps:
[( 71 - 866 ) ÷ 866] x 100 = -91.8%
Formula
Percentage change = [(71 - 866) / 866] x 100
Subtract the new number by the original number
71 - 866 = -795
-795 ÷ 866 = -0.918013856812933
-0.918013856812933 x 100 = -91.8%