28.91% is the change from 512 to 660
Calculation steps:
[( 660 - 512 ) ÷ 512] x 100 = 28.91%
Formula
Percentage change = [(660 - 512) / 512] x 100
Subtract the new number by the original number
660 - 512 = 148
148 ÷ 512 = 0.2890625
0.2890625 x 100 = 28.91%