-83.26% is the change from 866 to 145
Calculation steps:
[( 145 - 866 ) ÷ 866] x 100 = -83.26%
Formula
Percentage change = [(145 - 866) / 866] x 100
Subtract the new number by the original number
145 - 866 = -721
-721 ÷ 866 = -0.8325635103926097
-0.8325635103926097 x 100 = -83.26%