-22.52% is the change from 866 to 671
Calculation steps:
[( 671 - 866 ) ÷ 866] x 100 = -22.52%
Formula
Percentage change = [(671 - 866) / 866] x 100
Subtract the new number by the original number
671 - 866 = -195
-195 ÷ 866 = -0.2251732101616628
-0.2251732101616628 x 100 = -22.52%