-80.4% is the change from 857 to 168
Calculation steps:
[( 168 - 857 ) ÷ 857] x 100 = -80.4%
Formula
Percentage change = [(168 - 857) / 857] x 100
Subtract the new number by the original number
168 - 857 = -689
-689 ÷ 857 = -0.8039673278879813
-0.8039673278879813 x 100 = -80.4%