8.79% is the change from 512 to 557
Calculation steps:
[( 557 - 512 ) ÷ 512] x 100 = 8.79%
Formula
Percentage change = [(557 - 512) / 512] x 100
Subtract the new number by the original number
557 - 512 = 45
45 ÷ 512 = 0.087890625
0.087890625 x 100 = 8.79%