-15.64% is the change from 390 to 329
Calculation steps:
[( 329 - 390 ) ÷ 390] x 100 = -15.64%
Formula
Percentage change = [(329 - 390) / 390] x 100
Subtract the new number by the original number
329 - 390 = -61
-61 ÷ 390 = -0.1564102564102564
-0.1564102564102564 x 100 = -15.64%