60.31% is the change from 509 to 816
Calculation steps:
[( 816 - 509 ) ÷ 509] x 100 = 60.31%
Formula
Percentage change = [(816 - 509) / 509] x 100
Subtract the new number by the original number
816 - 509 = 307
307 ÷ 509 = 0.6031434184675835
0.6031434184675835 x 100 = 60.31%