-6.84% is the change from 512 to 477
Calculation steps:
[( 477 - 512 ) ÷ 512] x 100 = -6.84%
Formula
Percentage change = [(477 - 512) / 512] x 100
Subtract the new number by the original number
477 - 512 = -35
-35 ÷ 512 = -0.068359375
-0.068359375 x 100 = -6.84%