-50.41% is the change from 857 to 425
Calculation steps:
[( 425 - 857 ) ÷ 857] x 100 = -50.41%
Formula
Percentage change = [(425 - 857) / 857] x 100
Subtract the new number by the original number
425 - 857 = -432
-432 ÷ 857 = -0.5040840140023337
-0.5040840140023337 x 100 = -50.41%