-98.4% is the change from 501 to 8
Calculation steps:
[( 8 - 501 ) ÷ 501] x 100 = -98.4%
Formula
Percentage change = [(8 - 501) / 501] x 100
Subtract the new number by the original number
8 - 501 = -493
-493 ÷ 501 = -0.9840319361277445
-0.9840319361277445 x 100 = -98.4%