-3.1% is the change from 355 to 344
Calculation steps:
[( 344 - 355 ) ÷ 355] x 100 = -3.1%
Formula
Percentage change = [(344 - 355) / 355] x 100
Subtract the new number by the original number
344 - 355 = -11
-11 ÷ 355 = -0.030985915492957747
-0.030985915492957747 x 100 = -3.1%