40.45% is the change from 581 to 816
Calculation steps:
[( 816 - 581 ) ÷ 581] x 100 = 40.45%
Formula
Percentage change = [(816 - 581) / 581] x 100
Subtract the new number by the original number
816 - 581 = 235
235 ÷ 581 = 0.4044750430292599
0.4044750430292599 x 100 = 40.45%