-7.74% is the change from 866 to 799
Calculation steps:
[( 799 - 866 ) ÷ 866] x 100 = -7.74%
Formula
Percentage change = [(799 - 866) / 866] x 100
Subtract the new number by the original number
799 - 866 = -67
-67 ÷ 866 = -0.07736720554272518
-0.07736720554272518 x 100 = -7.74%