-42.47% is the change from 857 to 493
Calculation steps:
[( 493 - 857 ) ÷ 857] x 100 = -42.47%
Formula
Percentage change = [(493 - 857) / 857] x 100
Subtract the new number by the original number
493 - 857 = -364
-364 ÷ 857 = -0.42473745624270715
-0.42473745624270715 x 100 = -42.47%