-6.93% is the change from 866 to 806
Calculation steps:
[( 806 - 866 ) ÷ 866] x 100 = -6.93%
Formula
Percentage change = [(806 - 866) / 866] x 100
Subtract the new number by the original number
806 - 866 = -60
-60 ÷ 866 = -0.06928406466512702
-0.06928406466512702 x 100 = -6.93%