-4.06% is the change from 345 to 331
Calculation steps:
[( 331 - 345 ) ÷ 345] x 100 = -4.06%
Formula
Percentage change = [(331 - 345) / 345] x 100
Subtract the new number by the original number
331 - 345 = -14
-14 ÷ 345 = -0.04057971014492753
-0.04057971014492753 x 100 = -4.06%