40.69% is the change from 580 to 816
Calculation steps:
[( 816 - 580 ) ÷ 580] x 100 = 40.69%
Formula
Percentage change = [(816 - 580) / 580] x 100
Subtract the new number by the original number
816 - 580 = 236
236 ÷ 580 = 0.4068965517241379
0.4068965517241379 x 100 = 40.69%