-2.19% is the change from 866 to 847
Calculation steps:
[( 847 - 866 ) ÷ 866] x 100 = -2.19%
Formula
Percentage change = [(847 - 866) / 866] x 100
Subtract the new number by the original number
847 - 866 = -19
-19 ÷ 866 = -0.021939953810623556
-0.021939953810623556 x 100 = -2.19%