-34.06% is the change from 866 to 571
Calculation steps:
[( 571 - 866 ) ÷ 866] x 100 = -34.06%
Formula
Percentage change = [(571 - 866) / 866] x 100
Subtract the new number by the original number
571 - 866 = -295
-295 ÷ 866 = -0.3406466512702079
-0.3406466512702079 x 100 = -34.06%