64.65% is the change from 512 to 843
Calculation steps:
[( 843 - 512 ) ÷ 512] x 100 = 64.65%
Formula
Percentage change = [(843 - 512) / 512] x 100
Subtract the new number by the original number
843 - 512 = 331
331 ÷ 512 = 0.646484375
0.646484375 x 100 = 64.65%