-53.85% is the change from 845 to 390
Calculation steps:
[( 390 - 845 ) ÷ 845] x 100 = -53.85%
Formula
Percentage change = [(390 - 845) / 845] x 100
Subtract the new number by the original number
390 - 845 = -455
-455 ÷ 845 = -0.5384615384615384
-0.5384615384615384 x 100 = -53.85%