-98.41% is the change from 502 to 8
Calculation steps:
[( 8 - 502 ) ÷ 502] x 100 = -98.41%
Formula
Percentage change = [(8 - 502) / 502] x 100
Subtract the new number by the original number
8 - 502 = -494
-494 ÷ 502 = -0.9840637450199203
-0.9840637450199203 x 100 = -98.41%