-66.74% is the change from 857 to 285
Calculation steps:
[( 285 - 857 ) ÷ 857] x 100 = -66.74%
Formula
Percentage change = [(285 - 857) / 857] x 100
Subtract the new number by the original number
285 - 857 = -572
-572 ÷ 857 = -0.6674445740956826
-0.6674445740956826 x 100 = -66.74%