9.57% is the change from 512 to 561
Calculation steps:
[( 561 - 512 ) ÷ 512] x 100 = 9.57%
Formula
Percentage change = [(561 - 512) / 512] x 100
Subtract the new number by the original number
561 - 512 = 49
49 ÷ 512 = 0.095703125
0.095703125 x 100 = 9.57%