-97.95% is the change from 390 to 8
Calculation steps:
[( 8 - 390 ) ÷ 390] x 100 = -97.95%
Formula
Percentage change = [(8 - 390) / 390] x 100
Subtract the new number by the original number
8 - 390 = -382
-382 ÷ 390 = -0.9794871794871794
-0.9794871794871794 x 100 = -97.95%