63.09% is the change from 512 to 835
Calculation steps:
[( 835 - 512 ) ÷ 512] x 100 = 63.09%
Formula
Percentage change = [(835 - 512) / 512] x 100
Subtract the new number by the original number
835 - 512 = 323
323 ÷ 512 = 0.630859375
0.630859375 x 100 = 63.09%