-80.68% is the change from 859 to 166
Calculation steps:
[( 166 - 859 ) ÷ 859] x 100 = -80.68%
Formula
Percentage change = [(166 - 859) / 859] x 100
Subtract the new number by the original number
166 - 859 = -693
-693 ÷ 859 = -0.8067520372526193
-0.8067520372526193 x 100 = -80.68%