-19.85% is the change from 398 to 319
Calculation steps:
[( 319 - 398 ) ÷ 398] x 100 = -19.85%
Formula
Percentage change = [(319 - 398) / 398] x 100
Subtract the new number by the original number
319 - 398 = -79
-79 ÷ 398 = -0.1984924623115578
-0.1984924623115578 x 100 = -19.85%