-91.57% is the change from 581 to 49
Calculation steps:
[( 49 - 581 ) ÷ 581] x 100 = -91.57%
Formula
Percentage change = [(49 - 581) / 581] x 100
Subtract the new number by the original number
49 - 581 = -532
-532 ÷ 581 = -0.9156626506024096
-0.9156626506024096 x 100 = -91.57%