-99.21% is the change from 504 to 4
Calculation steps:
[( 4 - 504 ) ÷ 504] x 100 = -99.21%
Formula
Percentage change = [(4 - 504) / 504] x 100
Subtract the new number by the original number
4 - 504 = -500
-500 ÷ 504 = -0.9920634920634921
-0.9920634920634921 x 100 = -99.21%