68.16% is the change from 512 to 861
Calculation steps:
[( 861 - 512 ) ÷ 512] x 100 = 68.16%
Formula
Percentage change = [(861 - 512) / 512] x 100
Subtract the new number by the original number
861 - 512 = 349
349 ÷ 512 = 0.681640625
0.681640625 x 100 = 68.16%