2.18% is the change from 321 to 328
Calculation steps:
[( 328 - 321 ) ÷ 321] x 100 = 2.18%
Formula
Percentage change = [(328 - 321) / 321] x 100
Subtract the new number by the original number
328 - 321 = 7
7 ÷ 321 = 0.021806853582554516
0.021806853582554516 x 100 = 2.18%