-0.29% is the change from 345 to 344
Calculation steps:
[( 344 - 345 ) ÷ 345] x 100 = -0.29%
Formula
Percentage change = [(344 - 345) / 345] x 100
Subtract the new number by the original number
344 - 345 = -1
-1 ÷ 345 = -0.002898550724637681
-0.002898550724637681 x 100 = -0.29%