51.37% is the change from 512 to 775
Calculation steps:
[( 775 - 512 ) ÷ 512] x 100 = 51.37%
Formula
Percentage change = [(775 - 512) / 512] x 100
Subtract the new number by the original number
775 - 512 = 263
263 ÷ 512 = 0.513671875
0.513671875 x 100 = 51.37%