-2.18% is the change from 321 to 314
Calculation steps:
[( 314 - 321 ) ÷ 321] x 100 = -2.18%
Formula
Percentage change = [(314 - 321) / 321] x 100
Subtract the new number by the original number
314 - 321 = -7
-7 ÷ 321 = -0.021806853582554516
-0.021806853582554516 x 100 = -2.18%