-96.03% is the change from 857 to 34
Calculation steps:
[( 34 - 857 ) ÷ 857] x 100 = -96.03%
Formula
Percentage change = [(34 - 857) / 857] x 100
Subtract the new number by the original number
34 - 857 = -823
-823 ÷ 857 = -0.9603267211201867
-0.9603267211201867 x 100 = -96.03%