-55.08% is the change from 866 to 389
Calculation steps:
[( 389 - 866 ) ÷ 866] x 100 = -55.08%
Formula
Percentage change = [(389 - 866) / 866] x 100
Subtract the new number by the original number
389 - 866 = -477
-477 ÷ 866 = -0.5508083140877598
-0.5508083140877598 x 100 = -55.08%