-98.37% is the change from 490 to 8
Calculation steps:
[( 8 - 490 ) ÷ 490] x 100 = -98.37%
Formula
Percentage change = [(8 - 490) / 490] x 100
Subtract the new number by the original number
8 - 490 = -482
-482 ÷ 490 = -0.9836734693877551
-0.9836734693877551 x 100 = -98.37%