-88.85% is the change from 511 to 57
Calculation steps:
[( 57 - 511 ) ÷ 511] x 100 = -88.85%
Formula
Percentage change = [(57 - 511) / 511] x 100
Subtract the new number by the original number
57 - 511 = -454
-454 ÷ 511 = -0.8884540117416829
-0.8884540117416829 x 100 = -88.85%