-99.2% is the change from 499 to 4
Calculation steps:
[( 4 - 499 ) ÷ 499] x 100 = -99.2%
Formula
Percentage change = [(4 - 499) / 499] x 100
Subtract the new number by the original number
4 - 499 = -495
-495 ÷ 499 = -0.9919839679358717
-0.9919839679358717 x 100 = -99.2%