-17.13% is the change from 397 to 329
Calculation steps:
[( 329 - 397 ) ÷ 397] x 100 = -17.13%
Formula
Percentage change = [(329 - 397) / 397] x 100
Subtract the new number by the original number
329 - 397 = -68
-68 ÷ 397 = -0.1712846347607053
-0.1712846347607053 x 100 = -17.13%