-49.19% is the change from 866 to 440
Calculation steps:
[( 440 - 866 ) ÷ 866] x 100 = -49.19%
Formula
Percentage change = [(440 - 866) / 866] x 100
Subtract the new number by the original number
440 - 866 = -426
-426 ÷ 866 = -0.49191685912240185
-0.49191685912240185 x 100 = -49.19%