-47.02% is the change from 857 to 454
Calculation steps:
[( 454 - 857 ) ÷ 857] x 100 = -47.02%
Formula
Percentage change = [(454 - 857) / 857] x 100
Subtract the new number by the original number
454 - 857 = -403
-403 ÷ 857 = -0.47024504084014
-0.47024504084014 x 100 = -47.02%