-50.39% is the change from 887 to 440
Calculation steps:
[( 440 - 887 ) ÷ 887] x 100 = -50.39%
Formula
Percentage change = [(440 - 887) / 887] x 100
Subtract the new number by the original number
440 - 887 = -447
-447 ÷ 887 = -0.503945885005637
-0.503945885005637 x 100 = -50.39%