-16.41% is the change from 512 to 428
Calculation steps:
[( 428 - 512 ) ÷ 512] x 100 = -16.41%
Formula
Percentage change = [(428 - 512) / 512] x 100
Subtract the new number by the original number
428 - 512 = -84
-84 ÷ 512 = -0.1640625
-0.1640625 x 100 = -16.41%