-97.99% is the change from 398 to 8
Calculation steps:
[( 8 - 398 ) ÷ 398] x 100 = -97.99%
Formula
Percentage change = [(8 - 398) / 398] x 100
Subtract the new number by the original number
8 - 398 = -390
-390 ÷ 398 = -0.9798994974874372
-0.9798994974874372 x 100 = -97.99%