-5.47% is the change from 329 to 311
Calculation steps:
[( 311 - 329 ) ÷ 329] x 100 = -5.47%
Formula
Percentage change = [(311 - 329) / 329] x 100
Subtract the new number by the original number
311 - 329 = -18
-18 ÷ 329 = -0.0547112462006079
-0.0547112462006079 x 100 = -5.47%