-54.05% is the change from 840 to 386
Calculation steps:
[( 386 - 840 ) ÷ 840] x 100 = -54.05%
Formula
Percentage change = [(386 - 840) / 840] x 100
Subtract the new number by the original number
386 - 840 = -454
-454 ÷ 840 = -0.5404761904761904
-0.5404761904761904 x 100 = -54.05%