-25.17% is the change from 866 to 648
Calculation steps:
[( 648 - 866 ) ÷ 866] x 100 = -25.17%
Formula
Percentage change = [(648 - 866) / 866] x 100
Subtract the new number by the original number
648 - 866 = -218
-218 ÷ 866 = -0.2517321016166282
-0.2517321016166282 x 100 = -25.17%