-2.18% is the change from 642 to 628
Calculation steps:
[( 628 - 642 ) ÷ 642] x 100 = -2.18%
Formula
Percentage change = [(628 - 642) / 642] x 100
Subtract the new number by the original number
628 - 642 = -14
-14 ÷ 642 = -0.021806853582554516
-0.021806853582554516 x 100 = -2.18%