-53.69% is the change from 840 to 389
Calculation steps:
[( 389 - 840 ) ÷ 840] x 100 = -53.69%
Formula
Percentage change = [(389 - 840) / 840] x 100
Subtract the new number by the original number
389 - 840 = -451
-451 ÷ 840 = -0.5369047619047619
-0.5369047619047619 x 100 = -53.69%