81.64% is the change from 512 to 930
Calculation steps:
[( 930 - 512 ) ÷ 512] x 100 = 81.64%
Formula
Percentage change = [(930 - 512) / 512] x 100
Subtract the new number by the original number
930 - 512 = 418
418 ÷ 512 = 0.81640625
0.81640625 x 100 = 81.64%