41.31% is the change from 581 to 821
Calculation steps:
[( 821 - 581 ) ÷ 581] x 100 = 41.31%
Formula
Percentage change = [(821 - 581) / 581] x 100
Subtract the new number by the original number
821 - 581 = 240
240 ÷ 581 = 0.41308089500860584
0.41308089500860584 x 100 = 41.31%