57.03% is the change from 512 to 804
Calculation steps:
[( 804 - 512 ) ÷ 512] x 100 = 57.03%
Formula
Percentage change = [(804 - 512) / 512] x 100
Subtract the new number by the original number
804 - 512 = 292
292 ÷ 512 = 0.5703125
0.5703125 x 100 = 57.03%