-31.86% is the change from 587 to 400
Calculation steps:
[( 400 - 587 ) ÷ 587] x 100 = -31.86%
Formula
Percentage change = [(400 - 587) / 587] x 100
Subtract the new number by the original number
400 - 587 = -187
-187 ÷ 587 = -0.3185689948892675
-0.3185689948892675 x 100 = -31.86%