-17.09% is the change from 398 to 330
Calculation steps:
[( 330 - 398 ) ÷ 398] x 100 = -17.09%
Formula
Percentage change = [(330 - 398) / 398] x 100
Subtract the new number by the original number
330 - 398 = -68
-68 ÷ 398 = -0.1708542713567839
-0.1708542713567839 x 100 = -17.09%