-98.78% is the change from 328 to 4
Calculation steps:
[( 4 - 328 ) ÷ 328] x 100 = -98.78%
Formula
Percentage change = [(4 - 328) / 328] x 100
Subtract the new number by the original number
4 - 328 = -324
-324 ÷ 328 = -0.9878048780487805
-0.9878048780487805 x 100 = -98.78%