-64.55% is the change from 866 to 307
Calculation steps:
[( 307 - 866 ) ÷ 866] x 100 = -64.55%
Formula
Percentage change = [(307 - 866) / 866] x 100
Subtract the new number by the original number
307 - 866 = -559
-559 ÷ 866 = -0.6454965357967667
-0.6454965357967667 x 100 = -64.55%