-80.81% is the change from 865 to 166
Calculation steps:
[( 166 - 865 ) ÷ 865] x 100 = -80.81%
Formula
Percentage change = [(166 - 865) / 865] x 100
Subtract the new number by the original number
166 - 865 = -699
-699 ÷ 865 = -0.8080924855491329
-0.8080924855491329 x 100 = -80.81%