-80.98% is the change from 857 to 163
Calculation steps:
[( 163 - 857 ) ÷ 857] x 100 = -80.98%
Formula
Percentage change = [(163 - 857) / 857] x 100
Subtract the new number by the original number
163 - 857 = -694
-694 ÷ 857 = -0.809801633605601
-0.809801633605601 x 100 = -80.98%