-28.28% is the change from 587 to 421
Calculation steps:
[( 421 - 587 ) ÷ 587] x 100 = -28.28%
Formula
Percentage change = [(421 - 587) / 587] x 100
Subtract the new number by the original number
421 - 587 = -166
-166 ÷ 587 = -0.282793867120954
-0.282793867120954 x 100 = -28.28%