-10.57% is the change from 511 to 457
Calculation steps:
[( 457 - 511 ) ÷ 511] x 100 = -10.57%
Formula
Percentage change = [(457 - 511) / 511] x 100
Subtract the new number by the original number
457 - 511 = -54
-54 ÷ 511 = -0.10567514677103718
-0.10567514677103718 x 100 = -10.57%