13.48% is the change from 512 to 581
Calculation steps:
[( 581 - 512 ) ÷ 512] x 100 = 13.48%
Formula
Percentage change = [(581 - 512) / 512] x 100
Subtract the new number by the original number
581 - 512 = 69
69 ÷ 512 = 0.134765625
0.134765625 x 100 = 13.48%