-98.4% is the change from 499 to 8
Calculation steps:
[( 8 - 499 ) ÷ 499] x 100 = -98.4%
Formula
Percentage change = [(8 - 499) / 499] x 100
Subtract the new number by the original number
8 - 499 = -491
-491 ÷ 499 = -0.9839679358717435
-0.9839679358717435 x 100 = -98.4%