-80.45% is the change from 849 to 166
Calculation steps:
[( 166 - 849 ) ÷ 849] x 100 = -80.45%
Formula
Percentage change = [(166 - 849) / 849] x 100
Subtract the new number by the original number
166 - 849 = -683
-683 ÷ 849 = -0.8044758539458187
-0.8044758539458187 x 100 = -80.45%