-82.91% is the change from 866 to 148
Calculation steps:
[( 148 - 866 ) ÷ 866] x 100 = -82.91%
Formula
Percentage change = [(148 - 866) / 866] x 100
Subtract the new number by the original number
148 - 866 = -718
-718 ÷ 866 = -0.8290993071593533
-0.8290993071593533 x 100 = -82.91%