-73.09% is the change from 866 to 233
Calculation steps:
[( 233 - 866 ) ÷ 866] x 100 = -73.09%
Formula
Percentage change = [(233 - 866) / 866] x 100
Subtract the new number by the original number
233 - 866 = -633
-633 ÷ 866 = -0.73094688221709
-0.73094688221709 x 100 = -73.09%