59.38% is the change from 512 to 816
Calculation steps:
[( 816 - 512 ) ÷ 512] x 100 = 59.38%
Formula
Percentage change = [(816 - 512) / 512] x 100
Subtract the new number by the original number
816 - 512 = 304
304 ÷ 512 = 0.59375
0.59375 x 100 = 59.38%