-34.89% is the change from 857 to 558
Calculation steps:
[( 558 - 857 ) ÷ 857] x 100 = -34.89%
Formula
Percentage change = [(558 - 857) / 857] x 100
Subtract the new number by the original number
558 - 857 = -299
-299 ÷ 857 = -0.34889148191365227
-0.34889148191365227 x 100 = -34.89%