7.81% is the change from 512 to 552
Calculation steps:
[( 552 - 512 ) ÷ 512] x 100 = 7.81%
Formula
Percentage change = [(552 - 512) / 512] x 100
Subtract the new number by the original number
552 - 512 = 40
40 ÷ 512 = 0.078125
0.078125 x 100 = 7.81%
Example