-6.65% is the change from 511 to 477
Calculation steps:
[( 477 - 511 ) ÷ 511] x 100 = -6.65%
Formula
Percentage change = [(477 - 511) / 511] x 100
Subtract the new number by the original number
477 - 511 = -34
-34 ÷ 511 = -0.06653620352250489
-0.06653620352250489 x 100 = -6.65%