-81.74% is the change from 849 to 155
Calculation steps:
[( 155 - 849 ) ÷ 849] x 100 = -81.74%
Formula
Percentage change = [(155 - 849) / 849] x 100
Subtract the new number by the original number
155 - 849 = -694
-694 ÷ 849 = -0.817432273262662
-0.817432273262662 x 100 = -81.74%