-3.24% is the change from 339 to 328
Calculation steps:
[( 328 - 339 ) ÷ 339] x 100 = -3.24%
Formula
Percentage change = [(328 - 339) / 339] x 100
Subtract the new number by the original number
328 - 339 = -11
-11 ÷ 339 = -0.032448377581120944
-0.032448377581120944 x 100 = -3.24%