-83.14% is the change from 866 to 146
Calculation steps:
[( 146 - 866 ) ÷ 866] x 100 = -83.14%
Formula
Percentage change = [(146 - 866) / 866] x 100
Subtract the new number by the original number
146 - 866 = -720
-720 ÷ 866 = -0.8314087759815243
-0.8314087759815243 x 100 = -83.14%