-33.39% is the change from 587 to 391
Calculation steps:
[( 391 - 587 ) ÷ 587] x 100 = -33.39%
Formula
Percentage change = [(391 - 587) / 587] x 100
Subtract the new number by the original number
391 - 587 = -196
-196 ÷ 587 = -0.3339011925042589
-0.3339011925042589 x 100 = -33.39%