2.54% is the change from 512 to 525
Calculation steps:
[( 525 - 512 ) ÷ 512] x 100 = 2.54%
Formula
Percentage change = [(525 - 512) / 512] x 100
Subtract the new number by the original number
525 - 512 = 13
13 ÷ 512 = 0.025390625
0.025390625 x 100 = 2.54%