-68.48% is the change from 866 to 273
Calculation steps:
[( 273 - 866 ) ÷ 866] x 100 = -68.48%
Formula
Percentage change = [(273 - 866) / 866] x 100
Subtract the new number by the original number
273 - 866 = -593
-593 ÷ 866 = -0.684757505773672
-0.684757505773672 x 100 = -68.48%