-79.1% is the change from 866 to 181
Calculation steps:
[( 181 - 866 ) ÷ 866] x 100 = -79.1%
Formula
Percentage change = [(181 - 866) / 866] x 100
Subtract the new number by the original number
181 - 866 = -685
-685 ÷ 866 = -0.7909930715935335
-0.7909930715935335 x 100 = -79.1%