-0.3% is the change from 329 to 328
Calculation steps:
[( 328 - 329 ) ÷ 329] x 100 = -0.3%
Formula
Percentage change = [(328 - 329) / 329] x 100
Subtract the new number by the original number
328 - 329 = -1
-1 ÷ 329 = -0.00303951367781155
-0.00303951367781155 x 100 = -0.3%