-2.49% is the change from 642 to 626
Calculation steps:
[( 626 - 642 ) ÷ 642] x 100 = -2.49%
Formula
Percentage change = [(626 - 642) / 642] x 100
Subtract the new number by the original number
626 - 642 = -16
-16 ÷ 642 = -0.024922118380062305
-0.024922118380062305 x 100 = -2.49%