-92.56% is the change from 511 to 38
Calculation steps:
[( 38 - 511 ) ÷ 511] x 100 = -92.56%
Formula
Percentage change = [(38 - 511) / 511] x 100
Subtract the new number by the original number
38 - 511 = -473
-473 ÷ 511 = -0.9256360078277887
-0.9256360078277887 x 100 = -92.56%