-30.75% is the change from 839 to 581
Calculation steps:
[( 581 - 839 ) ÷ 839] x 100 = -30.75%
Formula
Percentage change = [(581 - 839) / 839] x 100
Subtract the new number by the original number
581 - 839 = -258
-258 ÷ 839 = -0.3075089392133492
-0.3075089392133492 x 100 = -30.75%