-16.02% is the change from 512 to 430
Calculation steps:
[( 430 - 512 ) ÷ 512] x 100 = -16.02%
Formula
Percentage change = [(430 - 512) / 512] x 100
Subtract the new number by the original number
430 - 512 = -82
-82 ÷ 512 = -0.16015625
-0.16015625 x 100 = -16.02%