-15.59% is the change from 866 to 731
Calculation steps:
[( 731 - 866 ) ÷ 866] x 100 = -15.59%
Formula
Percentage change = [(731 - 866) / 866] x 100
Subtract the new number by the original number
731 - 866 = -135
-135 ÷ 866 = -0.1558891454965358
-0.1558891454965358 x 100 = -15.59%