-15.04% is the change from 512 to 435
Calculation steps:
[( 435 - 512 ) ÷ 512] x 100 = -15.04%
Formula
Percentage change = [(435 - 512) / 512] x 100
Subtract the new number by the original number
435 - 512 = -77
-77 ÷ 512 = -0.150390625
-0.150390625 x 100 = -15.04%