-53.33% is the change from 857 to 400
Calculation steps:
[( 400 - 857 ) ÷ 857] x 100 = -53.33%
Formula
Percentage change = [(400 - 857) / 857] x 100
Subtract the new number by the original number
400 - 857 = -457
-457 ÷ 857 = -0.5332555425904317
-0.5332555425904317 x 100 = -53.33%