-5.18% is the change from 328 to 311
Calculation steps:
[( 311 - 328 ) ÷ 328] x 100 = -5.18%
Formula
Percentage change = [(311 - 328) / 328] x 100
Subtract the new number by the original number
311 - 328 = -17
-17 ÷ 328 = -0.051829268292682924
-0.051829268292682924 x 100 = -5.18%