-8.89% is the change from 866 to 789
Calculation steps:
[( 789 - 866 ) ÷ 866] x 100 = -8.89%
Formula
Percentage change = [(789 - 866) / 866] x 100
Subtract the new number by the original number
789 - 866 = -77
-77 ÷ 866 = -0.08891454965357967
-0.08891454965357967 x 100 = -8.89%