-8.6% is the change from 349 to 319
Calculation steps:
[( 319 - 349 ) ÷ 349] x 100 = -8.6%
Formula
Percentage change = [(319 - 349) / 349] x 100
Subtract the new number by the original number
319 - 349 = -30
-30 ÷ 349 = -0.08595988538681948
-0.08595988538681948 x 100 = -8.6%