-0.64% is the change from 628 to 624
Calculation steps:
[( 624 - 628 ) ÷ 628] x 100 = -0.64%
Formula
Percentage change = [(624 - 628) / 628] x 100
Subtract the new number by the original number
624 - 628 = -4
-4 ÷ 628 = -0.006369426751592357
-0.006369426751592357 x 100 = -0.64%