-49.82% is the change from 857 to 430
Calculation steps:
[( 430 - 857 ) ÷ 857] x 100 = -49.82%
Formula
Percentage change = [(430 - 857) / 857] x 100
Subtract the new number by the original number
430 - 857 = -427
-427 ÷ 857 = -0.4982497082847141
-0.4982497082847141 x 100 = -49.82%