-41.19% is the change from 857 to 504
Calculation steps:
[( 504 - 857 ) ÷ 857] x 100 = -41.19%
Formula
Percentage change = [(504 - 857) / 857] x 100
Subtract the new number by the original number
504 - 857 = -353
-353 ÷ 857 = -0.411901983663944
-0.411901983663944 x 100 = -41.19%