-99.41% is the change from 508 to 3
Calculation steps:
[( 3 - 508 ) ÷ 508] x 100 = -99.41%
Formula
Percentage change = [(3 - 508) / 508] x 100
Subtract the new number by the original number
3 - 508 = -505
-505 ÷ 508 = -0.9940944881889764
-0.9940944881889764 x 100 = -99.41%