-88.8% is the change from 509 to 57
Calculation steps:
[( 57 - 509 ) ÷ 509] x 100 = -88.8%
Formula
Percentage change = [(57 - 509) / 509] x 100
Subtract the new number by the original number
57 - 509 = -452
-452 ÷ 509 = -0.888015717092338
-0.888015717092338 x 100 = -88.8%