-82.79% is the change from 866 to 149
Calculation steps:
[( 149 - 866 ) ÷ 866] x 100 = -82.79%
Formula
Percentage change = [(149 - 866) / 866] x 100
Subtract the new number by the original number
149 - 866 = -717
-717 ÷ 866 = -0.8279445727482679
-0.8279445727482679 x 100 = -82.79%