-90.88% is the change from 329 to 30
Calculation steps:
[( 30 - 329 ) ÷ 329] x 100 = -90.88%
Formula
Percentage change = [(30 - 329) / 329] x 100
Subtract the new number by the original number
30 - 329 = -299
-299 ÷ 329 = -0.9088145896656535
-0.9088145896656535 x 100 = -90.88%