3.52% is the change from 512 to 530
Calculation steps:
[( 530 - 512 ) ÷ 512] x 100 = 3.52%
Formula
Percentage change = [(530 - 512) / 512] x 100
Subtract the new number by the original number
530 - 512 = 18
18 ÷ 512 = 0.03515625
0.03515625 x 100 = 3.52%