51.17% is the change from 512 to 774
Calculation steps:
[( 774 - 512 ) ÷ 512] x 100 = 51.17%
Formula
Percentage change = [(774 - 512) / 512] x 100
Subtract the new number by the original number
774 - 512 = 262
262 ÷ 512 = 0.51171875
0.51171875 x 100 = 51.17%