-14.89% is the change from 329 to 280
Calculation steps:
[( 280 - 329 ) ÷ 329] x 100 = -14.89%
Formula
Percentage change = [(280 - 329) / 329] x 100
Subtract the new number by the original number
280 - 329 = -49
-49 ÷ 329 = -0.14893617021276595
-0.14893617021276595 x 100 = -14.89%