-16.88% is the change from 397 to 330
Calculation steps:
[( 330 - 397 ) ÷ 397] x 100 = -16.88%
Formula
Percentage change = [(330 - 397) / 397] x 100
Subtract the new number by the original number
330 - 397 = -67
-67 ÷ 397 = -0.16876574307304787
-0.16876574307304787 x 100 = -16.88%