-98.43% is the change from 508 to 8
Calculation steps:
[( 8 - 508 ) ÷ 508] x 100 = -98.43%
Formula
Percentage change = [(8 - 508) / 508] x 100
Subtract the new number by the original number
8 - 508 = -500
-500 ÷ 508 = -0.984251968503937
-0.984251968503937 x 100 = -98.43%