-16.83% is the change from 398 to 331
Calculation steps:
[( 331 - 398 ) ÷ 398] x 100 = -16.83%
Formula
Percentage change = [(331 - 398) / 398] x 100
Subtract the new number by the original number
331 - 398 = -67
-67 ÷ 398 = -0.16834170854271358
-0.16834170854271358 x 100 = -16.83%