-83.16% is the change from 986 to 166
Calculation steps:
[( 166 - 986 ) ÷ 986] x 100 = -83.16%
Formula
Percentage change = [(166 - 986) / 986] x 100
Subtract the new number by the original number
166 - 986 = -820
-820 ÷ 986 = -0.8316430020283976
-0.8316430020283976 x 100 = -83.16%