-6.1% is the change from 344 to 323
Calculation steps:
[( 323 - 344 ) ÷ 344] x 100 = -6.1%
Formula
Percentage change = [(323 - 344) / 344] x 100
Subtract the new number by the original number
323 - 344 = -21
-21 ÷ 344 = -0.061046511627906974
-0.061046511627906974 x 100 = -6.1%