-25.06% is the change from 866 to 649
Calculation steps:
[( 649 - 866 ) ÷ 866] x 100 = -25.06%
Formula
Percentage change = [(649 - 866) / 866] x 100
Subtract the new number by the original number
649 - 866 = -217
-217 ÷ 866 = -0.25057736720554274
-0.25057736720554274 x 100 = -25.06%