-98.97% is the change from 390 to 4
Calculation steps:
[( 4 - 390 ) ÷ 390] x 100 = -98.97%
Formula
Percentage change = [(4 - 390) / 390] x 100
Subtract the new number by the original number
4 - 390 = -386
-386 ÷ 390 = -0.9897435897435898
-0.9897435897435898 x 100 = -98.97%