-26.79% is the change from 866 to 634
Calculation steps:
[( 634 - 866 ) ÷ 866] x 100 = -26.79%
Formula
Percentage change = [(634 - 866) / 866] x 100
Subtract the new number by the original number
634 - 866 = -232
-232 ÷ 866 = -0.2678983833718245
-0.2678983833718245 x 100 = -26.79%