-80.8% is the change from 849 to 163
Calculation steps:
[( 163 - 849 ) ÷ 849] x 100 = -80.8%
Formula
Percentage change = [(163 - 849) / 849] x 100
Subtract the new number by the original number
163 - 849 = -686
-686 ÷ 849 = -0.8080094228504122
-0.8080094228504122 x 100 = -80.8%