39.49% is the change from 585 to 816
Calculation steps:
[( 816 - 585 ) ÷ 585] x 100 = 39.49%
Formula
Percentage change = [(816 - 585) / 585] x 100
Subtract the new number by the original number
816 - 585 = 231
231 ÷ 585 = 0.39487179487179486
0.39487179487179486 x 100 = 39.49%