76.56% is the change from 512 to 904
Calculation steps:
[( 904 - 512 ) ÷ 512] x 100 = 76.56%
Formula
Percentage change = [(904 - 512) / 512] x 100
Subtract the new number by the original number
904 - 512 = 392
392 ÷ 512 = 0.765625
0.765625 x 100 = 76.56%