-0.48% is the change from 624 to 621
Calculation steps:
[( 621 - 624 ) ÷ 624] x 100 = -0.48%
Formula
Percentage change = [(621 - 624) / 624] x 100
Subtract the new number by the original number
621 - 624 = -3
-3 ÷ 624 = -0.004807692307692308
-0.004807692307692308 x 100 = -0.48%